Eureka lesson 21

What is the measure of angle ABC in diagram a?

• 90°

• 40°

• 50°

• 180°

What is the sum of the measures of angles EFG and HFG in diagram b?

• 180°

• 210°

• 150°

• 130°

What is the measure of angle LJK in diagram c?

• 90°

• 25°

• 65°

• 155°

What is a right angle?

• An angle that measures less than 90°

• An angle that measures 90°

• An angle that measures more than 90°

• An angle that measures 180°

Which term describes an angle that measures greater than 90°?

• Acute angle

• Right angle

• Obtuse angle

• Straight angle

What is an acute angle?

• An angle that measures less than 90°

• An angle that measures 90°

• An angle that measures more than 90°

• An angle that measures 180°

What is a straight angle?

• An angle that measures less than 90°

• An angle that measures 90°

• An angle that measures more than 90°

• An angle that measures 180°

What are complementary angles?

• Two angles with a sum of 180°

• Two angles with a sum of 90°

• Two angles each measuring 90°

• Two angles each measuring 180°

What are supplementary angles?

• Two angles with a sum of 90°

• Two angles each measuring 90°

• Two angles with a sum of 180°

• Two angles each measuring 180°

What is the value of r in the diagram , where m∠JKL = 180° and m∠JKM = 117°?

• A) 63

• B) 117

• C) 180

• D) 297