Understanding Angles for Grade 5

What is the definition of an angle?

• An angle is a type of polygon.

• An angle is the figure formed by two rays with a common endpoint.

• An angle is a straight line.

• An angle is the distance between two points.

Name the three types of angles based on their measurement.

• Acute, Straight, Right

• Straight, Reflex, Complementary

• Supplementary, Vertical, Adjacent

• Acute, Right, Obtuse

How do you measure an angle using a protractor?

• Measure the angle by drawing a line from the vertex to the protractor's center.

• Estimate the angle by comparing it to a known angle without using the protractor.

• Use a ruler to find the length of the angle's sides.

• Align the protractor with the angle and read the measurement where the angle intersects the scale.

What is a right angle and how many degrees does it measure?

• 45 degrees

• 180 degrees

• 60 degrees

• 90 degrees

What is the difference between acute and obtuse angles?

• Acute angles are less than 90 degrees; obtuse angles are more than 90 degrees and less than 180 degrees.

• Acute angles are between 0 and 45 degrees; obtuse angles are between 90 and 135 degrees.

• Acute angles are more than 180 degrees; obtuse angles are less than 90 degrees.

• Acute angles are exactly 90 degrees; obtuse angles are less than 90 degrees.