Classify Triangles by Their Angles

• acute

• right

• obtuse

• acute

• obtuse

• right

• acute

• right

• obtuse

• acute

• right

• obtuse

Classify the given triangle.

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

You can classify triangles by their ___________ and by their ____________. (Select the two that apply)

• sides

• shape

• color

• angles

A triangle with all angles less than 90 degrees is called as

• Obtuse angled triangle

• Acute angled triangle

How many acute angles must an acute triangle have?

• 1

• 2

• 3

• 4

In an obtuse angled triangle, how many angles are more than 90 degrees?

• 1

• 2

• 3

• 4