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.

www.geogebra.org

Draw your conclusion from the activity

Find the value of x

1. 100 degree
2. 180 degree
3. 70 degree
4. 120 degree

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

1. Interior opposite angles
2. vertically opposite angle
3. Exterior angle
4. adjacent angles

AFL: Value of x is

1. 69 degree
2. 180 degree
3. 70 degree
4. 90 degree

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