• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar
  • Skip to footer

CBSE Tuts

CBSE Maths notes, CBSE physics notes, CBSE chemistry notes

  • NCERT Solutions
    • NCERT Solutions for Class 12 English Flamingo and Vistas
    • NCERT Solutions for Class 11 English
    • NCERT Solutions for Class 11 Hindi
    • NCERT Solutions for Class 12 Hindi
    • NCERT Books Free Download
  • TS Grewal
    • TS Grewal Class 12 Accountancy Solutions
    • TS Grewal Class 11 Accountancy Solutions
  • CBSE Sample Papers
  • NCERT Exemplar Problems
  • English Grammar
    • Wordfeud Cheat
  • MCQ Questions

Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles

Contents

Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles (Including Types, Properties and Constructions)

Selina Publishers Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles (Including Types, Properties and Constructions)

Triangles Exercise 26A – Selina Concise Mathematics Class 6 ICSE Solutions

Question 1.
In each of the following, find the marked unknown angles :
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A Q1
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A Q1.1
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A 1

Question 2.
Can a triangle together have the following angles ?
(i) 55°, 55° and 80°
(ii) 33°, 74° and 73°
(iii) 85°, 95° and 22°.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A 2

Question 3.
Find x, if the angles of a triangle are:
(i) x°, x°, x°
(ii) x°, 2x°, 2x°
(iii) 2x°, 4x°, 6x°
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A 3

Question 4.
One angle of a right-angled triangle is 70°. Find the other acute angle.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A 4

Question 5.
In ∆ABC, ∠A = ∠B = 62° ; find ∠C.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A 5

Question 6.
In ∆ABC, C = 56°C = 56° ∠B = ∠C and ∠A = 100° ; find ∠B.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A 6

Question 7.
Find, giving reasons, the unknown marked angles, in each triangle drawn below:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A Q7

Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A Q7.1
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A 7

Question 8.
Classify the following triangles according to angle :
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A Q8

Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A Q8.1
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A 8

Question 9.
Classify the following triangles according to sides :
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A Q9
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26A 9

Triangles Exercise 26B – Selina Concise Mathematics Class 6 ICSE Solutions

Construct traingle ABC, when :
Question 1.
AB = 6 cm, BC = 8 cm and AC = 4 cm.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26B 10

Question 2.
AB = 3.5 cm, AC = 4.8 cm and BC = 5.2 cm.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26B 11

Question 3.
AB = BC = 5 cm and AC = 3 cm. Mea¬sure angles A and C. Is ∠A = ∠C?
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26B 12

Question 4.
AB = BC = CA = 4.5 cm. Measure all the angles of the triangle. Are they equal ?
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26B 13

Question 5.
AB = 3 cm, BC = 7 cm and ∠B = 90°.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26B 14

Question 6.
AC = 4.5 cm, BC = 6 cm and ∠C = 60°.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26B 15

Question 7.
AC = 6 cm, ∠A = 60“ and ∠C = 45°. Measure AB and BC.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26B 16

Question 8.
AB = 5.4 cm, ∠A = 30° and ∠B = 90°. Measure ∠C and side BC.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26B 17

Question 9.
AB = 7 cm, ∠B = 120° and ∠A = 30°. Measure AC and BC.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26B 18

Question 10.
BC = 3 cm, AC = 4 cm and AB = 5 cm. Measure angle ACB. Give a special name to this triangle.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Ex 26B 19

Triangles Revision Exercise – Selina Concise Mathematics Class 6 ICSE Solutions

Question 1.
If each of the two equal angles of an isosceles triangle is 68°, find the third angle.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 20

Question 2.
One of the angles of a triangle is 110°, the two other angles are equal. Find their value.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 21

Question 3.
The angles of a triangle are in the ratio 3:5: 7. Find each angle.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 22

Question 4.
The angles of a triangle are (2x – 30°),(3x – 40°) and (\(\frac { 5 }{ 2 }\)x + 10°) Find the value of x .
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 23

Question 5.
In each of the following figures, triangle ABC is equilateral and triangle PBC is isosceles. If PBA = 20°; find in each case:
(a) angle PBC.
(b) angle BPC.
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex Q5
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 24

Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 25

Question 6.
Construct a triangle ABC given AB = 6 cm, BC = 5 cm and CA = 5.6 cm. From vertex A draw a perpendicular on to side BC. Measure the length of this perpendicular.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 26

Question 7.
Construct a triangle PQR, given PQ = 6 cm, ∠P = 60° and ∠Q = 30°. Measure angle R and the length of PR.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 27

Question 8.
Construct a triangle ABC given BC = 5 cm, AC = 6 cm and ∠C = 75°. Draw the bisector of the interior angle at A. Let this bisector meet BC at P ; measure BP.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 28

Question 9.
Using ruler and a pair compass only, construct a triangle XYZ given YZ = 7 cm, ∠XYZ = 60° and ∠XZY = 45°. Draw the bisectors of angles X and Y.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 29

Question 10.
Using ruler and a pair compass only, construct a triangle PQR, given PQ = 5.5 cm, QR = 7.5 cm and RP = 6 cm. Draw the bisectors of the interior angles at P, Q and R. Do these bisectors meet at the same point ?
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 30

Question 11.
One angle of a triangle is 80° and the other two are in the ratio 3 : 2. Find the unknown angles of the triangle.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 31

Question 12.
Find the value of x if ∠A = 32°, ∠B = 55° and obtuse angle AED = 115°.
Solution:
Selina Concise Mathematics Class 6 ICSE Solutions Chapter 26 Triangles Revision Ex 32

Selina Concise Mathematics Class 6 ICSE Solutions

Primary Sidebar

NCERT Exemplar problems With Solutions CBSE Previous Year Questions with Solutoins CBSE Sample Papers
  • The Summer Of The Beautiful White Horse Answers
  • Job Application Letter class 12 Samples
  • Science Lab Manual Class 9
  • Letter to The Editor Class 12 Samples
  • Unseen Passage For Class 6 Answers
  • NCERT Solutions for Class 12 Hindi Core
  • Invitation and Replies Class 12 Examples
  • Advertisement Writing Class 11 Examples
  • Lab Manual Class 10 Science

Recent Posts

  • Understanding Diversity Question Answer Class 6 Social Science Civics Chapter 1 NCERT Solutions
  • Our Changing Earth Question Answer Class 7 Social Science Geography Chapter 3 NCERT Solutions
  • Inside Our Earth Question Answer Class 7 Social Science Geography Chapter 2 NCERT Solutions
  • Rulers and Buildings Question Answer Class 7 Social Science History Chapter 5 NCERT Solutions
  • On Equality Question Answer Class 7 Social Science Civics Chapter 1 NCERT Solutions
  • Role of the Government in Health Question Answer Class 7 Social Science Civics Chapter 2 NCERT Solutions
  • Vital Villages, Thriving Towns Question Answer Class 6 Social Science History Chapter 9 NCERT Solutions
  • New Empires and Kingdoms Question Answer Class 6 Social Science History Chapter 11 NCERT Solutions
  • The Delhi Sultans Question Answer Class 7 Social Science History Chapter 3 NCERT Solutions
  • The Mughal Empire Question Answer Class 7 Social Science History Chapter 4 NCERT Solutions
  • India: Climate Vegetation and Wildlife Question Answer Class 6 Social Science Geography Chapter 8 NCERT Solutions
  • Traders, Kings and Pilgrims Question Answer Class 6 Social Science History Chapter 10 NCERT Solutions
  • Environment Question Answer Class 7 Social Science Geography Chapter 1 NCERT Solutions
  • Understanding Advertising Question Answer Class 7 Social Science Civics Chapter 7 NCERT Solutions
  • The Making of Regional Cultures Question Answer Class 7 Social Science History Chapter 9 NCERT Solutions

Footer

Maths NCERT Solutions

NCERT Solutions for Class 12 Maths
NCERT Solutions for Class 11 Maths
NCERT Solutions for Class 10 Maths
NCERT Solutions for Class 9 Maths
NCERT Solutions for Class 8 Maths
NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 6 Maths

SCIENCE NCERT SOLUTIONS

NCERT Solutions for Class 12 Physics
NCERT Solutions for Class 12 Chemistry
NCERT Solutions for Class 11 Physics
NCERT Solutions for Class 11 Chemistry
NCERT Solutions for Class 10 Science
NCERT Solutions for Class 9 Science
NCERT Solutions for Class 7 Science
MCQ Questions NCERT Solutions
CBSE Sample Papers
NCERT Exemplar Solutions LCM and GCF Calculator
TS Grewal Accountancy Class 12 Solutions
TS Grewal Accountancy Class 11 Solutions