Acute, Right, Obtuse Triangles

A triangle has angle measurements of 71°, 82°, and 27°. What kind of triangle is it?

• acute

• right

• obtuse

• 360 degrees

What kind of triangle is it?

• acute

• right

• obtuse

• 360 degrees

In an ___________ triangle one angle is greater than 90 degrees.

• acute

• right

• obtuse

• 360 degrees

A triangle has angle measurements of 32°, 137°, and 11°. What kind of triangle is it?

• acute

• right

• obtuse

• 360 degrees

Which type of angle is pictured?

• Acute

• Right

• Obtuse

• Straight

Acute triangles are triangles with only acute angles inside.

Select ALL the acute triangles below.

(There are 2 correct answers)

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Identify the triangle by its sides and angles

• Right Isosceles

• Right Scalene

• Obtuse Isosceles

• Obtuse Scalene

Acute triangles are triangles with only acute angles inside.

Select all the acute triangles below:

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• 
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Use the angles to classify the triangles

Match the following triangles with their correct definition.

• Has at least 2 equal sides.

• 
• Has no equal sides.

• 
• Has one right angle

• 
• all sides are the same length.

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• Has 3 acute angles

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