Classifying Triangles
Triangles can be classified in TWO ways:
1. Number of Congruent Sides
2. Angle Measure
Think of it as every triangle has a FIRST name and a LAST name, where its first name is its Congruent Side Classification and its last name is its Angle Measure classification.
Triangle Classification by Side
Use the the above applet to help define the below triangle classifications.
Scalene Triangle is a triangle with ____________ congruent/equal sides.
Isosceles Triangle is a triangle with ____________ congruent/equal sides
Equilateral Triangle is a triangle with __________ congruent/equal sides
Triangle Classification by Angle Measure
Acute Triangle is a triangle with _________ acute angles.
Obtuse Triangle is a triangle with _________ obtuse angle.
Right triangle is a triangle with __________ right angle.
PRACTICE
Example 1
What type of triangle is Triangle ABC. Select TWO choices.
Example 2
What type of triangle is Triangle DEF. Select TWO choices.
Example 3
What type of triangle is Triangle QRS. Select TWO choices.
Example 4
What type of triangle is Triangle XYZ. Select TWO choices.
Example 5
What type of triangle is Triangle LMN. Select TWO choices.