Acute, Obtuse and Right Triangles

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

• acute

• right

• obtuse

• 360 degrees

Use the angles to classify the triangles

Use the angles to classify the triangles

Use the angles to classify the triangles

all angles less than 90° - acute triangle

1 angle is equal to 90° - right triangle

1 angle is greater than 90° - obtuse triangle

Use the angles to classify the triangles

An obtuse triangle has (a)   ​

• one obtuse angle

• three obtuse angles

• one acute angle

Use the angles to classify the triangles

Use the angles to classify the triangles

Use the angles to classify the triangles

Use the angles to classify the triangles