Angles and protractors

What is a straight angle?

• An angle that measures 90 degrees.

• An angle that measures exactly 180 degrees.

• An angle that measures 45 degrees.

• An angle that measures 360 degrees.

Tags

CCSS.4.G.A.1

What is the difference between acute and obtuse angles?

• Acute angles are greater than 90 degrees, while obtuse angles are less than 90 degrees.

• Acute angles are less than 90 degrees, while obtuse angles are more than 90 degrees but less than 180 degrees.

• Acute angles are exactly 90 degrees, while obtuse angles are more than 180 degrees.

• Acute angles are less than 45 degrees, while obtuse angles are between 45 and 90 degrees.

Tags

CCSS.4.G.A.1

What is a protractor used for?

• To measure angles in degrees.

• To draw straight lines.

• To calculate the area of shapes.

• To measure distances on a map.

Tags

CCSS.4.MD.C.6

What is the measure of a right angle?

• 45 degrees

• 90 degrees

• 180 degrees

• 360 degrees

Tags

CCSS.4.G.A.1

What is the vertex of an angle?

• The point where the two rays of an angle meet.

• The angle formed by two intersecting lines.

• The length of the angle's sides.

• The area enclosed by the angle.

What is the measure of a full rotation in degrees?

• 180 degrees

• 360 degrees

• 90 degrees

• 270 degrees

Tags

CCSS.HSG.CO.A.1

CCSS.4.MD.C.5B

How do you use a protractor to measure an angle?

• Align the protractor's midpoint with the angle's vertex and read the scale where one ray crosses the protractor.

• Place the protractor flat on the table and measure the angle from the edge.

• Hold the protractor at a 45-degree angle to the angle being measured.

• Use the protractor to draw a line that bisects the angle.

Tags

CCSS.4.MD.C.6

What are complementary angles?

• Two angles that add up to 90 degrees.

• Two angles that add up to 180 degrees.

• Two angles that are equal in measure.

• Two angles that are adjacent to each other.

Tags

CCSS.7.G.B.5

What is an acute angle?

• An angle that measures exactly 90 degrees.

• An angle that measures more than 90 degrees.

• An angle that measures less than 90 degrees.

• An angle that measures exactly 45 degrees.

Tags

CCSS.4.G.A.1

What is an obtuse angle?

• An angle that measures exactly 90 degrees.

• An angle that measures less than 90 degrees.

• An angle that measures more than 90 degrees but less than 180 degrees.

• An angle that measures exactly 180 degrees.

Tags

CCSS.4.G.A.1