6.1  Angles
We will learn to recognize and name tapered angles and right angles in the shapes of rectangles, equal squares and triangles.

An angle is a shape formed by two lines that share the same endpoint, called the vertex of an angle.

Angles provide a way to express the difference in gradient between two lines that meet at an angle without having to define the gradient of both.

  • The unit of measurement for an angle is degrees (°).

Angles can be divided into 3 types:


Right Angle

The right angle is at 90°.

Acute Angle

An acute angle is an angle whose value is less than 90°.

Obtuse Angle

An obtuse angle is greater than 90° but less than 180°.