Classifying Triangles

Classifying Triangles

Topic 12 Lesson 2

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• There are many different types of triangles. Triangles can be classified by their sides.

• There are three special names given to triangles that tell how many sides are equal.​

​How many sides are the same?

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​How to Remember?

• ​Equilateral: "equal"-lateral (lateral means side) so they have all equal sides

• Isosceles: means "equal legs", and we have two legs, right?   Also iSOSceles has two equal "Sides" joined by an "Odd" side.

• Scalene: means "uneven" or "odd", so no equal sides.

Multiple Choice

Classify the triangle.

• Isosceles Triangle

• Equilateral Triangle

• Scalene Triangle

Multiple Choice

Classify the Triangle.

• Isosceles Triangle

• Equilateral Triangle

• Scalene Triangle

Multiple Choice

Classify the Triangle.

• Isosceles Triangle

• Equilateral Triangle

• Scalene Triangle

Triangles can be classified by the measure of their angles.

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HOW DO ANGLES CLASSIFY TRIANGLES?

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Multiple Choice

Classify the triangle.

• Acute Triangle

• Right Triangle

• Obtuse Triangle

Multiple Choice

Classify the triangle.

• Acute Triangle

• Right Triangle

• Obtuse Triangle

Multiple Choice

Classify the triangle.

• Acute Triangle

• Right Triangle

• Obtuse Triangle

Lets Review

Do you remember all the triangles?​

Multiple Choice

Classify the triangle by its sides and angles.

• Isosceles, A

• Equilateral, Acute

• Isosceles, Obtuse

• Scalene, Right

Multiple Choice

Classify the triangle by its sides and angles.

• Equilateral, Acute

• Equilateral, Obtuse

• Isosceles, Acute

• Scalene, Acute

Do pages ​635-638.

Practice in your book.

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