Transcript 3 equal angles (all 60 o )

The 5 Angle Rules
All you need for almost any angle problem
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2
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Parallel lines
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• Any Triangle
All angles add up to 180o
Special triangles:
• Isosceles Triangle:
2 equal angles
• Equilateral Triangle:
3 equal angles (all 60o)
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The 5 Angle Rules
All you need for almost any angle problem
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What is the smallest number of triangles
you can split this shape up into?
Total angles in 3 triangles = 3 x 180 = 540o
So total angles in
a pentagon = 540o
Hexagon = 6 sides
4 triangles = 4 x 180 = 720o
Heptagon = 7 sides
5 triangles = 5 x 180 = 900o
Dodecagon = 12 sides
10 triangles = 10 x 180 = 1800o