Chapter 11 | Understanding Quadrilaterals | Class-8 DAV Secondary Mathematics

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Chapter 11 | Understanding Quadrilaterals | Class-8 DAV Secondary Mathematics

Understanding Quadrilaterals || Unit 11 Worksheet 1

1. Find the sum of interior angles of hexagon ABCDEF by dividing it into triangles.

Answer 1:

Find the sum of interior angles of hexagon ABCDEF by dividing it into triangles.

2. Find the sum of interior angles of a polygon of a given number of sides by using formula (n-2)*180°.

(i) 12 sides

Answer (i):

Find the sum of interior angles of a polygon of a given number of sides by using formula (n-2)*180°.

(ii) 9 sides

Answer (ii):

Chapter 11 | Understanding Quadrilaterals | Class-8 DAV Secondary Mathematics

(iii) 22 sides

Answer (iii):

Chapter 11 | Understanding Quadrilaterals | Class-8 DAV Secondary Mathematics

3. Find the measure of each angle of a regular octagon.

Answer :

Find the measure of each angle of a regular octagon.

4. Four angles of a pentagon are 100°, 175°, 85°, and 75°. Find the fifth angle.

Answer 4:

Four angles of a pentagon are 100°, 175°, 85°, and 75°. Find the fifth angle.

5. Find the measure of x in the given figure.

Answer 5:

Find the measure of x in the given figure.