Estimating Angles

What is the best estimate for an angle that looks smaller than a right angle?

• Obtuse angle, which is greater than 90º

• Right angle, which is exactly 90º

• Acute angle, which is less than 90º

• Straight angle, which is exactly 180º

Tags

CCSS.4.G.A.1

What is an angle?

• An angle is formed by two rays (sides) that meet at a point called the vertex.

• An angle is a straight line that measures 180 degrees.

• An angle is a figure formed by three points in a plane.

• An angle is the space between two intersecting lines.

Tags

CCSS.HSG.CO.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 best estimate for an angle that looks like it is between 90 degrees and 150 degrees?

• Acute angle

• Right angle

• Obtuse angle

• Straight angle

Tags

CCSS.4.G.A.1

What is a right angle?

• A right angle measures exactly 90 degrees.

• A right angle measures 45 degrees.

• A right angle measures 180 degrees.

• A right angle measures 60 degrees.

Tags

CCSS.4.G.A.1

What is the measure of a full rotation?

• 180 degrees

• 360 degrees

• 90 degrees

• 270 degrees

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

What is the best estimate for an angle that looks like it is exactly 90 degrees?

• A straight angle

• An acute angle

• A right angle

• An obtuse angle

Tags

CCSS.4.G.A.1

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

How do you estimate an angle?

• By measuring it with a protractor

• By comparing it to known angles like 90º, 180º, and 360º

• By using a compass to find the direction

• By drawing a straight line and measuring the distance

Tags

CCSS.4.MD.C.6

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