Classifying Triangles by Side and Angles

What are the two ways to classify triangles?

• By the angles and number of sides

• By the angles and side lengths

• By the side lengths and the size of the triangle

• By the angles and the how many points

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

• True

• False

What are the three ways to classify triangles by their sides?

• equilateral, right, isosceles

• scalene, obtuse, right

• equilateral, isosceles, scalene

• acute, right, isosceles

What is the correct term if the triangle has one 90 degree angle?

• scalene

• acute

• obtuse

• right

Side Classification: ​ (a)  

Angle Classification: ​ (b)  

• isosceles

• right

• scalene

• obtuse

• equilateral

• acute

Select the correct words to define the triangle shown in the picture.

The picture shows a(n) ​ (a)   ​ (b)   triangle.

• obtuse

• scalene

• acute

• right

• isosceles

• equilateral

Identify this triangle.

• Isosceles Triangle

• Scalene triangle

• obtuse triangle

• Equilateral triangle

CLASSIFY THE TRIANGLE

It's sides make it a ​ (a)   ​ triangle.

It's angles make it a ​ (b)   triangle.

• Equilateral

• acute

• Isosceles

• Scalene

• Right

• obtuse

TRIANGLES....based on SIDES and ANGLES

c

b

d

e

f

a

ACUTE

SCALENE

OBTUSE

EQUILATERAL

ISOSCELES

RIGHT

CLASSIFY THE TRIANGLE

It's sides make it a ​​ ​ (a)     ​ triangle.

It's angles make it a ​​​ (b)     triangle.

• scalene

• right

• equilateral

• acute

• isosceles

• obtuse