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Triangles: Equilateral, Isosceles, and Scalene

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by

Danesha Russ

on 11 December 2013

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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
Full transcript