Exploring Angles in Grade 4 Geometry

What is an angle formed by?

• A single line

• Three intersecting lines

• A circle

• Two intersecting lines

Which angle is exactly 90 degrees?

• Obtuse angle

• Straight angle

• Acute angle

• Right angle

What is the sum of degrees in a full rotation angle?

• 270 degrees

• 180 degrees

• 90 degrees

• 360 degrees

Which angles add up to 90 degrees?

• Obtuse angles

• Right angles

• Complementary angles

• Supplementary angles

If one angle is 50 degrees in a complementary pair, what is the other angle?

• 90 degrees

• 140 degrees

• 40 degrees

• 130 degrees

What type of angle is formed by an angle measurement of 175 degrees?

• Acute angle

• Right angle

• Straight angle

• Obtuse angle

What instrument is used to measure angles?

• Protractor

• Compass

• Caliper

• Ruler

Which angle is known to be exactly 180 degrees?

• Reflex angle

• Straight angle

• Right angle

• Acute angle

What is the measure of a reflex angle?

• More than 180 degrees

• Exactly 90 degrees

• Less than 90 degrees

• Less than 180 degrees

Which angle is less than 90 degrees?

• Acute angle

• Obtuse angle

• Right angle

• Straight angle