NCERT Class 8 Mathematics Solutions: Chapter 3 –Understanding Quadrilaterals Exercise 3.2 Part 1

Question: 1 Find in the following figures:

(a)

Image

Find the Value X in Given Figure

Given this figure find the value of x.

(b)

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Value of Two Angles Are Given

Find the value of x in given figure

Answer:

(a)

Let’s take two interior angle m and n.

Image:

In Triangle the Angle M, N and X Are Shown

Find interior and exterior angles of given figure

Here,

Exterior angle = Sum of opposite interior angles

(b)

Let’s take interior angle m, n and y.

Image:

In Figure Some Angles Values Are Given

Find the value of angle m, n and y.

Two interior angles are right angles = 90°

Here,

Thus, sum of the angles of pentagon