lines and angles

What type of angle measures exactly 90 degrees?

• Straight angle

• Obtuse angle

• Acute angle

• Right angle

Identify the type of angle that is less than 90 degrees.

• Right angle

• Straight angle

• Obtuse angle

• Acute angle

What do you call an angle that is greater than 90 degrees but less than 180 degrees?

• Straight angle

• Acute angle

• Right angle

• Obtuse angle

If two angles are complementary, what is the sum of their measures?

• 45 degrees

• 180 degrees

• 60 degrees

• 90 degrees

Calculate the measure of an angle if it is supplementary to a 75-degree angle.

• 90 degrees

• 105 degrees

• 45 degrees

• 120 degrees

What type of lines never intersect?

• Parallel lines

• Perpendicular lines

• Curved lines

• Intersecting lines

Define perpendicular lines.

• Lines that intersect at any angle.

• Lines that are parallel to each other.

• Perpendicular lines are lines that intersect at a right angle (90 degrees).

• Lines that never meet or cross each other.

If two lines intersect and form a pair of opposite angles, what can you say about those angles?

• The opposite angles are always acute.

• The opposite angles are complementary.

• The opposite angles are supplementary.

• The opposite angles are equal.

What is the measure of each angle in a pair of complementary angles if one angle is 30 degrees?

• 30 degrees and 60 degrees

• 15 degrees and 75 degrees

• 30 degrees and 30 degrees

• 45 degrees and 45 degrees

If two angles are supplementary and one angle measures 110 degrees, what is the measure of the other angle?

• 90 degrees

• 80 degrees

• 70 degrees

• 100 degrees