Mathematics - Class -8th

Which is a two-dimensional figure?

• Cylinder

• Circle

• Tetrahedron

• Sphere

The common name of a square prism is a

• Cube

• Pyramid

• Cuboid

• Polygon

How many faces, vertices, and edges does a hexagonal prism have?

• 12,8,18

• 8,12,18

• 18,12,8

• 12,18,8

A polyhedron has 6 faces and 6 vertices. How many edges does this have?

• 12

• 10

• 8

• 14

Euler's formula is not -

• E + 2 = F + V

• E - F + 2 = V

• F + E - V = 2

• F + V - E = 2

Which one is a three-dimensional figure?

• Triangle

• Cone

• Square

• Rhombus

A polyhedron has 5 faces and 9 edges. The number of vertices is -

• 6

• 8

• 12

• 7

The altitude of a rhombus whose area is 420 cm² and perimeter is 140 cm is-

• 12 cm

• 15 cm

• 14 cm

• 20 cm

The area of square whose diagonal is 20 cm is-

• 200 cm

• 240 cm²

• 400 cm²

• 200 cm²

The perimeter of an equilateral triangle whose area is 4✓3 cm² is-

• 9 cm

• 12 cm²

• 12 cm

• 15 cm