# Math > Year 3

## Recognise & Describe 2-d Shapes

2D Shapes

A 2D (two-dimensional) shape is flat with only two dimensions.

For example, the Football field is rectangular.

Properties of 2d shapes

Properties mean the features of different shapes. It includes:

→ number of sides

→ length of sides

→ number of vertices

→ types of angles

→ parallel or perpendicular lines

Let us discuss the properties of different 2d shapes.

Circle

A circle is a flat round 2d shape.
It is made up of one curved line.

Triangle

A triangle is a 2d shape with three sides.

A quadrilateral is a 2D shape made up of 4 straight sides.

Square

In a square,

• All the sides are of equal length

• All the angles are right angles (90°)

• Opposite sides are parallel

Rectangle

In a rectangle,

• Opposite sides are equal

• Opposite sides are parallel

• All the angles are right angles (90°)

Parallelogram

In a Parallelogram,

• Opposite sides are equal.

• Opposite sides are parallel.

• Opposite angles are equal.

Rhombus

In a Rhombus,

• All the sides are equal

• Opposite angles are equal

• Opposite sides are parallel

Trapezium

In a Trapezium,

• One pair of lines is parallel

• Two sets of equal angles

Other 2d shapes

Pentagon

Pentagon has:

• Five equal sides

• Five equal angles

Hexagon

Hexagon has:

• Six equal sides

• Six equal angles

Heptagon

Heptagon has:

• Seven equal sides

• Seven equal angles

Octagon

Octagon has:

• Eight equal sides

• Eight equal angles

Lets’ try to answer the questions now.

Question 1:

Name the shape by using the hints.

→ Sides of this shape are of equal length.

→ All the angles of this shape are right angles (90°)

→ The opposite sides of this shape are parallel.

Explanation:

All the sides of the square are of equal length.

All the angles of the square are right angles (90°)

The opposite sides of the square are parallel.

Question 2: Hexagon has ____ equal sides and ____ same angles.

Explanation:

The hexagon has six equal sides and six angles that are equal.

The hexagon has six equal sides and six same angles.

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