Exterior angle of triangle

• Mathematics
• Primary Education

Triangle

Learning Objective

1) Develop and apply the exterior angle property of a triangle to          find the measure of the unknown angle in the given triangle.

2)   Relate the concept to real-life situations.

Draw your conclusion from the activity

www.geogebra.org

Find the value of x from above figure is

1. 120
2. 135
3. 45
4. 50

The exterior angle of a triangle is equal to the sum of two

Exterior angles

Interior opposite angles

Alternate angles

Interior angles

Tell me three things
a) You have learnt today
b)You have done well
c)You would like to find more about

The value of x is equal to

40 degree

50 degree

70 degree