Classifying Triangles Vocabulary Quiz

1.) Acute Triangle

• Less than 90 degrees, all 3 angles are acute
• One right angle

2.) Right Triangle

• Less than 90 degrees, all 3 angles are acute
• One right angle

3.) Obtuse Triangle

• Right Triangle
• One obtuse triangle, greater than 90 degrees

4.) Equilateral Triangle

• All three sides are equal
• Two sides are equal

5.) Isosceles Triangle

• All three sides are equal
• Two sides are equal

6.) Scalene Triangle

• No sides are equal
• Two sides are equal

7.) All three sides are equal

• Equilateral triangle
• Scalene triangle

8.) One right angle

• Right triangle
• Acute triangle

9.) All three angles are acute and is less than 90 degrees.

• Obtuse triangle
• Acute triangle

10.) No sides are equal.

• Isosceles triangle
• Scalene triangle