We have 4 congruent equilateral triangles. What do we need more to make a pyramid?

Side of a square garden is 40 m. If the scale used to draw its picture is 1 cm: 8 m, then the perimeter of the square in the picture is

Which of the following is the number of vertices of a cone?

Which of the following is the number of vertices of sphere?

Which of the following is the base of a tetrahedron?

A pyramid on m sided polygon has ........... faces.

The net of a ....... has 6 rectangles.

A flat surface of a three-dimensional figure is a ....... and an is where two faces meet.

A ........ has 7 faces.

According to the Euler's formula, we have F + V - E = ________

A polyhedron has 30 edges and 12 vertices. How many faces does it have?

Write the number of faces.

Write the number of edges.

What is a triangular pyramid? What is a pyramid called if its base is a square?

Draw two figures for each 1-D, 2-D and 3- D.

The actual width of a classroom is 900 cm. If the scale chosen to make it drawing is 1: 30. Then, what will be the width of the room in the drawing?

A polyhedron has 7 faces and 10 vertices. How many edges does the polyhedron have?

Find number of faces of a polyhedron, which has 27 edges and 17 vertices.

Why the following solids are not polyhedron?
(i) A sphere
(ii) A cone
(iii) A cylinder

Following solids are made by joining cubes. Draw their different views.

Draw a map of your class room using proper scale and symbols for different objects.

Find the number of vertices in a polyhedron which has 30 edges and 12 faces.

How many vertices does the following solids have?
Octagonal pyramid

A polyhedron has 40 edges and 30 vertices. Find the number of its faces.

What is Euler's formula? Verify the Euler's formula for a pentagonal prism.

Determine the number of edges, vertices and faces in the following figure. Also, verify your answer.

The actual width of a store room is 320 cm. If the scale chosen to make its drawing is 1:4, then find the width of the room in the drawing.