Classifying Triangles: Acute, Obtuse, Right

In an ______________ triangle, all three angles are less than 90 degrees.

• acute

• right

• obtuse

• 360 degrees

In a ____________ triangle one angle is exactly 90 degrees.

• acute

• right

• obtuse

• 360 degrees

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

• acute

• right

• obtuse

• 360 degrees

What kind of triangle is this?

• acute

• right

• obtuse

• 360 degrees

What kind of triangle is this?

• acute

• right

• obtuse

• 360 degrees

What kind of triangle is this?

• acute

• right

• obtuse

• 360 degrees

What kind of triangle is this?

• 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