Classify Triangles

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Presentation Description

Introduction to classifying triangles by side and angle.

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Presentation Transcript

How can we classify this triangle? : 

1 How can we classify this triangle?

Objective : 

2 Objective Classify triangles as: Right Obtuse Acute Scalene Isosceles Equilateral

Quick Review : 

3 Quick Review Acute angle: an angle with a measure greater than 0 degrees, but less than 90 degrees. Obtuse angle: an angle with a measure greater than 90 degrees but less than 180 degrees. Right angle: an angle with a measure of 90 degrees. {Insert Graphic #3} {Insert Graphic #4}

Classifying by Angles : 

4 Classifying by Angles We can classify angles based on their inside angles three ways: Obtuse Right Acute

Obtuse Triangle : 

5 Obtuse Triangle An obtuse triangle has one obtuse angle.

Right Triangle : 

6 Right Triangle A right triangle has one right angle.

Acute Triangle : 

7 Acute Triangle An acute triangle has three acute angles.

Let’s Practice! : 

8 Let’s Practice! Suppose someone asks you to make a triangle with the angles: 60°, 60°, and 60° What kind of triangle would you be making?

Classifying by Side Lengths : 

9 Classifying by Side Lengths We can classify angles based on their side lengths three ways: Equilateral Isosceles Scalene

Equilateral Triangle : 

10 Equilateral Triangle An equilateral triangle has three sides that all have the same length.

Isosceles Triangle : 

11 Isosceles Triangle An isosceles triangle has two equal sides.

Scalene Triangle : 

12 Scalene Triangle A scalene triangle has no sides of equal length.

Let’s Practice! : 

13 Let’s Practice! Suppose someone asks you to make a triangle with the sides of length: 6 in, 6 in, and 10 in What kind of triangle would you be making?

Slide 14: 

14

Comparing and Contrasting Triangles : 

15 Comparing and Contrasting Triangles