Finding Missing Angles in Triangles and Quadrilaterals

What is the sum of the interior angles of a triangle?

• 90 degrees

• 360 degrees

• 180 degrees

• 270 degrees

Tags

CCSS.8.G.A.5

If one angle in a triangle is 28 degrees and another is 50 degrees, what is the measure of the third angle?

• 102 degrees

• 100 degrees

• 110 degrees

• 120 degrees

Tags

CCSS.8.G.A.5

In a triangle, if one angle is 45 degrees and another is 90 degrees, what is the measure of the third angle?

• 65 degrees

• 55 degrees

• 45 degrees

• 35 degrees

Tags

CCSS.8.G.A.5

What is the sum of the interior angles of a quadrilateral?

• 450 degrees

• 180 degrees

• 360 degrees

• 270 degrees

If a quadrilateral has angles measuring 75 degrees, 70 degrees, and 115 degrees, what is the measure of the fourth angle?

• 120 degrees

• 110 degrees

• 100 degrees

• 90 degrees

Tags

CCSS.HSG.C.A.3

In a parallelogram, if one angle is 100 degrees, what is the measure of the opposite angle?

• 80 degrees

• 90 degrees

• 100 degrees

• 110 degrees

Tags

CCSS.HSG.C.A.3

In a quadrilateral, if the angles are 124 degrees, 90 degrees, and 81 degrees, what is the measure of the fourth angle?

• 85 degrees

• 75 degrees

• 65 degrees

• 55 degrees

Tags

CCSS.HSG.C.A.3

In a triangle, if one angle is 90 degrees and another is 15 degrees, what is the measure of the third angle?

• 95 degrees

• 65 degrees

• 85 degrees

• 75 degrees

Tags

CCSS.8.G.A.5

If a triangle has angles 2x, 4x, and 90 degrees, what is the value of x?

• 18

• 15

• 12

• 10

Tags

CCSS.8.G.A.5

In a triangle, if the angles are x, 2x, and 90 degrees, what is the value of x?

• 35

• 30

• 25

• 20

Tags

CCSS.8.G.A.5