Chapter 11 Review

How many degrees are in an angle that turns through 1/2 of a circle?

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees

Which equation can you use to find m<XST

• 90 + 65 = x

• 180 - 90 = x

• 180 - 65 = x

• 180 - (90+65) = x

Which is an acute angle?

• <RST

• <RSX

• <WSX

• <WST

An arrow shows how a ray moved through a circle. Which statement best describes the turn?

• 1/4 turn clockwise

• 1/2 turn clockwise

• 1/2 turn counterclockwise

• 3/4 turn clockwise

Which equation shows how to find the angle measure of the part of the circle without the arrow?

• 180 - 90 = x

• 360 - 90 = x

• 360 - 180 = x

• 360 - 270 = x

What name is given to an angle that measures 150 degrees?

• acute angle

• obtuse angle

• right angle

• straight angle

Two angles form a straight angle. One of the angles measures 77 degrees. What is the measure of the other angle?

• 283

• 103

• 93

• 13

Which equation represents the sum of measures of two right angles?

• 60 degrees + 30 degrees = 90 degrees

• 70 degrees + 110 degrees = 180 degrees

• 180 degrees + 180 degrees = 360 degrees

• 90 degrees + 90 degrees = 180 degrees

What is the measure of the unknown angle?

• 142

• 38

• 302

• 180

What term best describes the triangle?

• acute

• right

• obtuse