Right, Acute, Obtuse Angle

An obtuse angle is...

• greater than 90 degrees but less than 180 degrees

• 90 degrees

• 45 degrees

• 180 degrees

Look around the room. Find an object that has an angle. Type the object and identify if it is a right, obtuse, or acute angle.

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What items can be identified that we see every day can be seen as a right angle?

Multiple answers

• doors

• windows

• stairs

• picture frame

What does an obtuse angle look like? Draw the angle below

This angle is:

• acute

• right

• obtuse

This is what kind of angle?

• obtuse

• right

• straight

• acute

Name this triangle.

• acute triangle

• right triangle

• straight triangle

• obtuse triangle

Q1. What type of angle is less than 90 degrees?

• A) acute

• B) obtuse

• C) right

• acute
• obtuse
• right

Q1. What type of angle is less than 90 degrees?

• A) acute

• B) obtuse

• C) right