Number

Statistics and Probability

Algebra

4.2 TRIANGLES

Name the following type of triangle and calculate the missing angle.
1.
Right Angled Triangle
$180° = 90°+60°+a a = 180°−90°+60° a = 30°$
2.
Isosceles Triangle
$180° = 30°+2a a = 180°−30° 2 a = 25°$

## Information

Remember the angles in a triangle add up to 180° and keep your eye on the type of triangle and apply what you know.