S.chand class 6 Mathematics Chapter 20 Exercise 20C

 Exercise 20C

Question 1

1. Find the value of a and $b$ in the following figures.

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Question 2

$\angle Q R S$ is an exterior angle of $\triangle P Q R$ at $R$. Name:

(i) interior adjacent angle and

(ii) the interior opposite angles corresponding to $\angle Q R S$.

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Question 3

Find the value of letter angles in the following figures.

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Question 4

One of the exterior angles of a triangle is $140^{\circ}$ and the interior opposite angles are in the ratio $2: 3$ Find the angles of the triangle.

Question 5

One of the exterior angles of a triangle is $120^{\circ}$ and its interior opposite angles are equal to each other. What is the measure of each of these two angles?

Multiple Choice Question (MCQ)

Tick (✔) the correct option.

6. In the adjacent figure, $A B D, A C E$ and $B C F$ are straight lines.

$\angle E A D=35^{\circ}$ and $\angle C B D=120^{\circ}$ find $\angle x$.

(a) $35^{\circ}$

(b) $60^{\circ}$

(c) $85^{\circ}$

(d) $120^{\circ}$