Angles and Polygons Practice Test

Answer explanation

180-86-61=33

Find the measure of the third angle in a triangle with two angles measuring 60 degrees each.

(a)  

Answer explanation

The sum of the angles in a triangle is 180^o

180^o - 60^o - 60^o = 60^o

A quadrilateral's angles are

110^o

80^o

50^o

What is the measurement of the missing angle?

Remember that the interior angles of a quadrilateral add up to 360^o .

• 90

• 100

• 130

• 120

Answer explanation

360^o - 110^o - 80^{o -} 50^o = 120^o

Determine the measure of the third angle, without measuring.

• 50

• 55

• 60

• 40

Answer explanation

180^o - 90^o - 40^o = 50^o

Determine the measure of the third angle, without measuring.

• 40

• 30

• 34

• 50

Determine the measure of the third angle, without measuring.

• 51

• 57

• 53

• 50

Extra Challenge:

Use what you know about straight angles to determine the interior angles at the bottom of this quadrilateral.

What is the measurement of the missing angle in the top right of the quadrilateral?

(a)  

Find the measurement of b

(a)  

Three angles of a quadrilateral are given. Find the measurement of the fourth angle.

(a)  

Three angles of a quadrilateral are given. Find the measurement of the fourth angle.

(a)