Classifying 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

Use the angles to classify the triangles

Find b.

Classify the triangle buy it's angle measures and it's side lengths.

• Right Isosceles triangle

• Acute Scalene triangle

• Obtuse scalene triangle

• Equilateral triangle

What type of triangle is shown?

• Isosceles

• Right-angled

• Equilateral

• Scalene

What kind of triangle is this?

• acute

• right

• obtuse

• 360 degrees

A triangle has angle measurements of 54°, 52°, and 74°. What kind of triangle is it?

• acute triangle

• right triangle

• obtuse triangle

• none of the above

Look at the sides and angles of this triangle. Which type of triangle is pictured?

• Equilateral Triangle

• Right Isosceles Triangle

• Obtuse Scalene Triangle

• Obtuse Equilateral Triangle

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

• acute

• right

• obtuse

• 360 degrees