Angles of Triangles

​RTI Angles of Triangles

​"The only place where success comes before work is in the dictionary.

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​-Unknown

Multiple Choice

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. #18

• 45°
• 90°
• 180°
• 360°

Multiple Choice

Solve for x. #6

• x = 7

• x = 8

• x = 6

• x = 9

Multiple Choice

Find the measure of angle A. #2

• 75^o
• 60^o
• 30^o
• 38^o

Multiple Choice

Solve for x. #8

• 28
• 12
• 10
• 2

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Multiple Choice

What is the measure of angle A in the triangle? #4

• 116*
• 25*
• 62*
• 54*

Multiple Choice

Find m ∠B. #10

• 150°

• 67°

• 54°

• 57°

Fill in the Blanks

Solve for x. #13

Multiple Choice

Fill in statement #2. #30

• $$m\angle6+m\angle2+m\angle3+m\angle5=360$$

• $$m\angle1+m\angle4=m\angle6$$

• $$m\angle1+m\angle2+m\angle3=180$$

• $$m\angle1+m\angle4+m\angle7=180$$

Multiple Choice

In the formal proof of the triangle sum theorem, the triangle is always formed between ________________________. #31

• perpendicular lines

• parallel lines

• intersecting lines

• a bunch of points