#### Transcript of Triangles: Equilateral, Isosceles, and Scalene

**Triangles: Equilateral, Isosceles, and Scalene**

What Do Triangles Look Like?

Triangles have three straight sides and three angles:

Hence where the name comes from

Tri means Three -angles

TRI-ANGLES

What makes a Triangle a Triangle?

The three angles that a Triangle has ALWAYS equal to 180 degrees.

What types of triangles are there?

Three special triangles have names that match to how many sides or angles they have.

There can be 3, 2, or no equal sides

Conclusion

Can you identify the six different types of triangles?

What Is A Triangle?

A Triangle is a unique kind of shape

Are these Triangles?

These are Triangles!

DEGREES

Equilateral Triangles

three equal sides and three equal angles, that is ALWAYS 60 degrees

Isosceles Triangle

Two equal sides and Two equal sides

Scalene Triangle

NO equal sides and NO equal angles

Angles that are ALL less then 90 degrees

Acute Triangles

Right Triangles

Has a Right angle of 90 degrees

Obtuse Triangles

The angle is MORE then 90 degrees

What are Angles?

"Interior Angles" are the angles inside a triangle

In triangles, internal angles MUST ALWAYS add up to 180 degrees

**Danesha Russ**

**3rd Grade Math**

**Triangles: Equilateral, Acute Isosceles, Right, Scalene, Obtuse**

Acute Triangle

Obtuse Triangle

Right Triangle

Scalene Triangle

Equilateral Triangle

Isosceles Triangle

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