# Mathematics Class 6 NCERT Solutions: Chapter 5 Understanding Elementary Shapes Exercise 5.6 – Part 1

Q.1 Name the types of following triangles:

(a) Triangle with lengths of sides, and.

(b) With cm, cm and cm.

(c) Such that.

(d)

(e)

(f)

Q.2 Match the following:

 Measure of Triangle Types of Triangle (i) 3 sides of equal length (a) Scalene (ii) 2 sides of equal length (b) Isosceles right angle (iii) All sides are of different length (c) Obtuse angle (iv) 3 acute angles (d) Right angle (v) 1 right angle (e) Equilateral (vi) 1 obtuse angle (f ) Acute angle (vii) 1 right angle with two sides of equal length (g) Isosceles

 Measure of Triangle Types of Triangle (i) 3 sides of equal length (e) Equilateral (ii) 2 sides of equal length (g) Isosceles (iii) All sides are of different length (a) Scalene (iv) 3 acute angles (f) Acute angle (v) 1 right angle (d) Right angle (vi) 1 obtuse angle (c) Obtuse angle (vii) 1 right angle with two sides of equal length (b) Isosceles right angle

Q.3 Name each of the following triangles in two different ways: (You may judge the nature of angle by observation).

(a)

Answer: Acute angled triangle and Isosceles triangle

(b)

Answer: Right-angled triangle and scalene triangle

(c)

Answer: Obtuse-angled triangle and Isosceles triangle

(d)

Answer: Right-angled triangle and Isosceles triangle

(e)

Answer: Equilateral triangle and acute angled triangle

(f)

Answer: Obtuse-angled triangle and scalene triangle