Diagonal is the line joining opposite corners of a geometrical shape.

__Diagonal__

** **

**Diagonal is the line
joining opposite corners of a geometrical shape.**

Observe the corners of the square.

The line joining opposite
corners of a square is
called the
**diagonal** of the square.

A square has two diagonals.

** **

**Diagonals of a cube:**

A Cube has six square faces. Each
square has two diagonals.

Diagonals in the faces = 6 × 2 = 12.

Diagonals in the inner sides of 4
corners = 4.

Total number of diagonals of a cube =
12 + 4 = 16.

**Draw the diagonals for
the given rectangle.**

How many diagonals will be there in a
cuboid? ** 16**
.

**Match the properties of
2D shapes by observing their sides and corners (vertices).**

1**. **Opposite sides are equal. **(d)**

2. There are no sides and corners. **(a)**

3. Sides may or may not be equal. **(b)**

4. All the four sides are equal. **(c)**

Tags : Geometry | Term 3 Chapter 1 | 3rd Maths , 3rd Maths : Term 3 Unit 1 : Geometry

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3rd Maths : Term 3 Unit 1 : Geometry : Diagonal | Geometry | Term 3 Chapter 1 | 3rd Maths

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