Identify Right Acute Obtuse Triangles

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

all angles less than 90° - acute triangle

1 angle is equal to 90° - right triangle

1 angle is greater than 90° - obtuse triangle

What Type of Triangle is this?

• right triangle

• acute triangle

• obtuse triangle

Which triangle has all three of its angles measuring less than 90°?

• Acute

• Right

• Obtuse

• Equilateral

A triangle that has 3 angles that measure less than 90 degrees.

• Right triangle

• Acute triangle

• Isosceles triangle

• Obtuse triangle

Use the angles to classify the triangles

Use the angles to classify the triangles

Find the measure of the missing angle in the triangle.