Sum of Triangle Theorem and Exterior Angle Theorem

Find the measure of the indicated angle.

Solve for x.

Solve for x.

What is the value of x?

Find <S

• A

• B

• C

• D

Which of the following terms best describes Angle d? 

• Remote interior angle

• Corresponding angle

• Exterior angle

• Interior angle

What is the measure of angle b?

• 36^o

• 56^o

• 63^o

• 117^o

The sum of the angle measures of a triangle is 180° 
m∠A + m∠B + m∠C = 180°

• Triangle Sum Theorem

• Exterior Angle Theorem

• Third Angle Theorem

• Centroid Theorem

The measure of an exterior angle of a triangle is equal to the sum of the measures of its remote interior angles.
m∠4 = m∠1 + m∠2

• Triangle Sum Theorem

• Exterior Angle Theorem

• Third Angles Theorem

• Congruent Triangles Theorem

Find the measure of the indicated angle. 

• 34°

• 46°

• 62°

• 36°