Types of Triangles

What is a TRIANGLE ? A closed figure formed by joining three line segments is called a TRIANGLE .

A triangle has three sides 1 2 3

A triangle has three angles 1 2 3

Interior Angles of Triangles B C The sum of the measure of the angles of a triangle is 1800. Ð A + Ð B + ÐC =1800

Classifying Triangles by Sides Isosceles Triangle at least two equal sides Scalene Triangle no equal sides Equilateral Triangle three equal sides E S T R I C K I

Classifying Triangles by Angles Acute Triangle three acute angles Right Triangle one right angle Obtuse Triangle one obtuse angle

Name the Type of Triangle

Name the Type of Triangle Equilateral Triangle

Name the Type of Triangle b.

Name the Type of Triangle b. Right Triangle

What is the measure of the missing angle?

What is the measure of the missing angle?

What is the measure of the missing angle?

What is the measure of the missing angle?

Name the Type of Triangle

Name the Type of Triangle Isosceles Triangle

Name the Type of Triangle

Name the Type of Triangle Scalene Triangle