7.3: Triangles

7.3: Triangles

Identify and classify triangles and find missing angle measures.

A triangles can be classified by it's side lengths.

Multiple Choice

Based on the side lengths of this triangle, what classification would it belong to?

• Scalene

• Isosceles

• Equilateral

• Neither

Multiple Choice

Based on the side lengths of this triangle, what classification would it belong to?

• Scalene

• Isosceles

• Equilateral

• Neither

Multiple Choice

Based on the side lengths of this triangle, what classification would it belong to?

• Scalene

• Isosceles

• Equilateral

• Neither

A triangles can be classified by it's angle measures.

Multiple Choice

Based on the angle measures of this triangle, what classification would it belong to?

• Acute

• Right

• Obtuse

• Equilateral

Multiple Choice

Based on the angle measures of this triangle, what classification would it belong to?

• Acute

• Right

• Obtuse

• Equilateral

Multiple Choice

Based on the angle measures of this triangle, what classification would it belong to?

• Acute

• Right

• Obtuse

• Equilateral

Multiple Choice

Based on the angle measures of this triangle, what classification would it belong to?

• Acute

• Right

• Obtuse

• Equilateral

Triangles are typically classified by both their angle measure and their side lengths.

Multiple Choice

Classify the triangle buy it's angle measures and it's side lengths.

• Right Isosceles triangle

• Acute Scalene triangle

• Obtuse Isosceles triangle

• Equilateral triangle

Multiple Choice

Classify the triangle buy it's angle measures and it's side lengths.

• Right Isosceles triangle

• Acute Scalene triangle

• Obtuse scalene triangle

• Equilateral triangle

Multiple Choice

Classify the triangle buy it's angle measures and it's side lengths.

• Right Isosceles triangle

• Acute Scalene triangle

• Obtuse scalene triangle

• Equilateral triangle

The 3 angles of ANY triangle add up to

 $180\degree$  

This is also refered to as the Triangle Sum Theorem

Multiple Choice

Find the measure of the missing angle in the triangle.

• $90\degree$

• $45\degree$

• $135\degree$

• $180\degree$

Multiple Choice

Find the measure of the missing angle in the triangle.

• $90\degree$

• $45\degree$

•  $130\degree$ 

•  $50\degree$ 

Multiple Choice

Find the measure of the missing angle in the triangle.

• $90\degree$

•  $58\degree$ 

•  $122\degree$ 

• $180\degree$

Multiple Choice

Find b.

•  $36\degree$ 

• $45\degree$

•  $90\degree$ 

•  $144\degree$ 

Multiple Choice

Find the measure of the missing angle in the triangle.

• $90\degree$

• $45\degree$

• $135\degree$

• $180\degree$

What did we learn today about triangles?

• Triangles can be classified by their side lengths

• Triangles can be classified by their angle measures

• Triangles can be classified by both side lengths and angle measure

• The sum of the angles of ANY triangle is $180\degree$ 

Today's Assignment

7.3 Triangles Quizziz