# Ex.15.4 Q2 Visualising Solid Shapes - NCERT Maths Class 7

## Question

Here are the shadows of some \(3-D\) objects, when seen under the lamp of an overhead projector. Identify the solid(s) that match each shadow. (There may be multiple answers for these!)

## Text Solution

**What is known?**

Some shadow of solid shapes

**What is unknown?**

Solid shapes for each shadow

**Reasoning:**

A spherical object gives a circular shape shadow.

A cylindrical object gives a shadow of a line.

A cubical object gives a square shape shadow.

A cuboidal object gives a rectangular shape shadow.

A conical object gives a triangular shadow.

**Steps:**

Solids will be:

(i) A **ball or sphere** will give shadow of a circle.

(ii) A **cube shape object like dice** will give shadow of a square.

(iii) An** ice- cream cone or a birthday cap** will give the shadow of triangle.

(iv) A **book or a cuboid shape** object will give shadow of a rectangle.