Basic Triangle Theorems

• acute

• obtuse

• right

• acute

• obtuse

• right

• acute

• obtuse

• right

• equilateral

• isosceles

• scalene

• equilateral

• isosceles

• scalene

A triangle has side lengths of 15 centimeters, 11 centimeters, and 9 centimeters. What kind of triangle is it?

• equilateral

• isosceles

• scalene

Name this triangle

• Acute, Scalene
• Obtuse, Scalene
• Right, Isosceles
• Acute, Equilateral

What is an "Acute" Angle?

• Angle that measures 180
• An Angle that measures 90
• An angle that measures more than 90
• An angle that measures less than 90

Which type of triangle is pictured?

• Equilateral Triangle
• Right Isosceles Triangle
• Obtuse Scalene Triangle
• Obtuse Equilateral Triangle

A triangle can be classified as an isosceles triangle if there are two equal sides.

• True

• False