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Lesson: Exterior Angle Inequality

In this lesson, we will learn to find the relationship between the angle measures of a triangle and compare between exterior angles and interior angles by using the exterior angle inequality theorem.

Worksheet: Exterior Angle Inequality • 4 Questions

Q1:

The figure shows some angles identified on triangle .

Identify which angle is an exterior angle.

Identify which angle is an interior angle.

Q2:

What is the sum of the sizes of the exterior angles of a triangle?

Q3:

Is ?

Q4:

Is the size of two right angles less than, equal to or greater than the sum of the interior angles of a triangle?

Aequal to
Bgreater than
Cless than

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