Finding Missing Angles: Key Relationships and Rules

What is the sum of the angles in any triangle?

• 90 degrees

• 180 degrees

• 360 degrees

• 270 degrees

Tags

CCSS.7.G.B.5

What is true about vertical angles?

• They are congruent.

• They are always 90 degrees.

• They are always 180 degrees.

• They are complementary.

Tags

CCSS.7.G.B.5

What do complementary angles add up to?

• 360 degrees

• 180 degrees

• 90 degrees

• 270 degrees

Tags

CCSS.7.G.B.5

What do supplementary angles add up to?

• 270 degrees

• 360 degrees

• 180 degrees

• 90 degrees

Tags

CCSS.7.G.B.5

In Example 1, if one angle is 130 degrees, what is the measure of the other angle on the straight line?

• 50 degrees

• 180 degrees

• 130 degrees

• 90 degrees

Tags

CCSS.7.G.B.5

In Example 2, if one vertical angle is 130 degrees, what is the measure of the opposite vertical angle?

• 180 degrees

• 90 degrees

• 50 degrees

• 130 degrees

Tags

CCSS.7.G.B.5

In Example 3, what is the measure of angle A if the supplementary angle is 120 degrees?

• 180 degrees

• 120 degrees

• 60 degrees

• 90 degrees

Tags

CCSS.7.G.B.5

In Example 3, what is the measure of angle B if the complementary angle is 10 degrees?

• 90 degrees

• 80 degrees

• 100 degrees

• 10 degrees

Tags

CCSS.8.G.A.5

In Example 3, what is the measure of angle C if the other two angles in the triangle are 60 degrees and 80 degrees?

• 60 degrees

• 40 degrees

• 100 degrees

• 80 degrees

Tags

CCSS.8.G.A.5

In Example 3, if two angles in a triangle are 59 degrees each, what is the measure of the third angle?

• 118 degrees

• 180 degrees

• 59 degrees

• 62 degrees

Tags

CCSS.8.G.A.5