Classifying Triangles Practice

Given: all the angles in a triangle add up to 180 degrees.

If a triangle has one angle that measures 81 degrees and another that measures 47 degrees, what is the measure of the third angle?

Mathematical Equivalence

ON

An obtuse triangle has (a)   obtuse angle(s).

• exactly one
• exactly two
• three
• no

Given: all the angles in a triangle add up to 180 degrees.

Classify the triangle that has one angle that measures 56 degrees and a second that measures 33 degrees.

• Acute triangle

• Right Triangle

• Obtuse Triangle

A right triangle has one angle that measures ​ (a)   .

Given: All the angles in an Equilateral Triangle are equal.

What is the measure of ∠S?

Mathematical Equivalence

ON

The triangle would be classified as a(n) ​ (a)   ​ (b)   .

• obtuse
• scalene
• acute
• right
• isosceles
• equilateral

The triangle would be classified as a(n) ​ (a)   ​ (b)  

• right
• isosceles
• acute
• obtuse
• scalene
• equilateral

What is the name of this kind of triangle?

• Scalene

• Isosceles

• Equilateral

Look at the sides of this triangle. What type of triangle is this?

• Equilateral

• Isosceles

• Scalene

• Equilateral

• Isosceles

• Scalene