Exploring Types of Angles: Acute, Obtuse, Right, and Straight

In this video, Mr. J explains four types of angles: obtuse, acute, right, and straight. An obtuse angle is greater than 90 degrees but less than 180 degrees. An acute angle is less than 90 degrees. A right angle equals exactly 90 degrees, and a straight angle is exactly 180 degrees. Examples are provided for each type to aid understanding.

What defines an obtuse angle?

• An angle less than 90 degrees

• An angle exactly 90 degrees

• An angle greater than 90 degrees but less than 180 degrees

• An angle exactly 180 degrees

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CCSS.4.G.A.1

An angle that is greater than 90 but less than 180 degrees is called?

• Acute

• Straight

• Obtuse

• Right

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CCSS.4.G.A.1

What is the characteristic of an acute angle?

• Exactly 90 degrees

• Less than 90 degrees

• Greater than 180 degrees

• Greater than 90 degrees

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CCSS.4.G.A.1

Which angle is defined as being less than 90 degrees?

• Right

• Acute

• Obtuse

• Straight

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CCSS.4.G.A.1

Which of the following angles is less than 90 degrees?

• Obtuse

• Right

• Straight

• Acute

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CCSS.4.G.A.1

How is a right angle uniquely identified?

• By being greater than 180 degrees

• By being less than 180 degrees

• By being less than 90 degrees

• By a square in its corner

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CCSS.4.G.A.1

Which angle is exactly 90 degrees?

• Acute

• Obtuse

• Right

• Straight

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CCSS.4.G.A.1

How can you visually identify a right angle?

• By a circle in its corner

• By a triangle in its corner

• By a square in its corner

• By a hexagon in its corner

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CCSS.4.G.A.1

What degree measure does a straight angle have?

• More than 180 degrees

• 180 degrees

• Less than 90 degrees

• 90 degrees

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CCSS.4.G.A.1

An angle that measures exactly 180 degrees is known as?

• Right

• Obtuse

• Straight

• Acute

Tags

CCSS.4.G.A.1