Classifying Triangle by Angle

Classify the triangle by angles and sides.

• Obtuse Scalene

• Obtuse Isosceles

• Acute Isosceles

• Equiangular Scalene

Classify the triangle by angles and sides.

• Obtuse Scalene

• Obtuse Isosceles

• Right Scalene

• Acute Isosceles

How many acute angles must an acute triangle have?

• 2

• 1

• 4

• 3

An _____________ triangle is a triangle with one obtuse angle and two acute angles.

• Scalene Triangle

• Right Triangle

• Obtuse Triangle

• None of these

Which type of angle is this?

• Acute

• Right

• Obtuse

• Straight

A triangle has angle measurements of 74°, 90°, and 16°. 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

A triangle with at least one angle greater than 90 degrees is called a(n) ________ triangle

• obtuse

• left

• right

• acute

Classify the following Triangle

• Right Isosceles Triangle

• Acute Isosceles Triangle

• Right  Scalene Triangle

• Acute Scalene Triangle

What type of triangle has only acute angles and no congruent sides?

• Right Isosceles Triangle

• Obtuse Isosceles Triangle

• Right Scalene Triangle

• Acute Scalene Triangle