All the Angles

All three angles in a triangle, when added together, must equal this amount.

• 60

• 90

• 360

• 180

A straight angle equals this amount.

• 90

• 180

• 360

• 1080

An obtuse angle is _________ than 90 degrees.

• greater

• less

A right angle equals this amount.

• 360

• 180

• 60

• 90

An acute angle is _______ than 90 degrees.

• greater

• less

What type of angle is shown?

• acute
• obtuse
• right
• straight

Find the measure of each angle indicated. 

• 139°
• 66°
• 138°
• 116°

What does the image show?

• perpendicular lines

• intersecting lines

• parallel lines

Find the measure of the missing angle.

• 90^o
• 10⁰
• 130^o
• 50^o

Which statement is NOT true?

• Parallel lines have the same slope.

• Parallel lines intersect at one point.

• Perpendicular lines form a right angle.