Understanding quadrilaterals

What is the measure of the missing angle?

• 85

• 75

• 100

• 45

What is the value of a?

• 0

• 10

• 12

• 27

Find the value of the missing angle measures.

• C
• D
• A
• B

 Find/encontrar m∠TSR  

•  18°

•  114°

•  100° 

Find the missing angle in a quadrilateral with angles measuring 45°, 75°, and 135°.

• 120°

• 60°

• 105°

• 90°

Answer explanation

To find the missing angle in a quadrilateral, subtract the sum of the given angles from 360°. 360° - (45° + 75° + 135°) = 105°. Therefore, the missing angle is 105°.

FILL IN:

A parallelogram has both pairs of opposite angles _____________.

• Congruent

• Complementary

• Supplementary

Find the missing angle marked with an x.

• 75
• 85
• 100
• 45

Three angles in a quadrilateral measure 58°, 77°, and 116°. What is the measure of the fourth angle?

• 29

• 129

• 109

• 49

Angle 1 is 34, angle 2 is 58, angle 3 is 100.  If this shape is a quadrilateral, what is the measure of the 4th angle.

• 186
• 121
• 168
• 90

What is the sum of a Quadrilaterals interior (inside) angles?

• 180
• 360
• 400
• 240