ICSE ICSE Class 8 - CISCE Question Bank Solutions

Find the number of sides in a regular polygon, if its exterior angle is : `1/3` of right angle

Given, A = {Triangles}, B = {Isosceles triangles}, C = {Equilateral triangles}. State the following statement is true or false. Give reasons.

B ⊆ A

Find the number of sides in a regular polygon, if its exterior angle is: two-fifth of right angle

Given, A = {Triangles}, B = {Isosceles triangles}, C = {Equilateral triangles}. State the following statement is true or false. Give reasons.

C ⊆ B

Is it possible to have a regular polygon whose interior angle is : 170°

Add : x³ − x²y + 5xy² + y³, - x³ − 9xy² + y³, 3x²y + 9xy²

Given, A = {Triangles}, B = {Isosceles triangles}, C = {Equilateral triangles}. State the following statment is true or false. Give reasons.

B ⊂ A

Is it possible to have a regular polygon whose interior angle is:

138°

Given, A = {Triangles}, B = {Isosceles triangles}, C = {Equilateral triangles}. State the following statement is true or false. Give reasons.

C ⊂ A 

Is it possible to have a regular polygon whose each exterior angle is: 80°

Given, A = {Triangles}, B = {Isosceles triangles}, C = {Equilateral triangles}. State the following statement is true or false. Give reasons.

C ⊆ B ⊆ A 

Find the total savings of a boy who saves ₹ (4x – 6y), ₹ (6x + 2y), ₹ (4y – x) and ₹ (y – 2x) for four consecutive weeks.

Is it possible to have a regular polygon whose each exterior angle is: 40° of a right angle.

Subtract : 4xy² from 3xy²

Subtract : −2x²y + 3xy² from 8x²y

Find the number of sides in a regular polygon, if its interior angle is equal to its exterior angle.

Given, A = {Quadrilaterals}, B = {Rectangles}, C = {Squares}, D= {Rhombuses}. State the following statement is true or false. Give reasons.

B ⊂ C

The exterior angle of a regular polygon is one-third of its interior angle. Find the number of sides in the polygon.

Subtract : 3a − 5b + c + 2d from 7a − 3b + c − 2d

Given, A = {Quadrilaterals}, B = {Rectangles}, C = {Squares}, D= {Rhombuses}. State the following statement is true or false. Give reasons.

D ⊂ B