Triangles (Week 10/18)

Find the measure of the angle indicated. 

• 139°
• 66°
• 138°
• 116°

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 

• 45°
• 90°
• 180°
• 360°

What is the third angle of a triangle whose 1st angle is 79 and the 2nd angle is 43?

• 43
• 58
• 72
• 101

Find the measure of the missing angle.

• 90^o
• 10⁰
• 130^o
• 50^o

Find x in the acute triangle.

Find t in the isoceles triangle.

Find the measure of angle A.

• 75^o

• 60^o

• 30^o

• 38^o

Solve for x and then find the measure of angle A.

• 180
• 70
• 54
• 56

Find the measure of the indicated angle.

Angles that are exactly 90 degrees are called _____ ______.

• tight angles
• acute angles
• obtuse angles
• right angles