Classify Right, Acute, Obtuse

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

• acute

• right

• obtuse

• 360 degrees

A triangle has angle measurements of 51°, 39°, and 90°. What kind of triangle is it?

• acute

• right

• obtuse

• 360 degrees

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

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

• acute

• right

• obtuse

• 360 degrees

• acute

• obtuse

• right

Which type of triangle is pictured?

• Equilateral Triangle

• Right Isosceles Triangle

• Obtuse Scalene Triangle

• Obtuse Equilateral Triangle

Classify this triangle by its angles.

• right

• equiangular

• acute

• obtuse

Classify this triangle by its sides and angles. 

• right isosceles

• acute scalene

• obtuse scalene

• acute isosceles

Select the letter that represents a right isosceles triangle. 

• A

• B

• C

• D