Triangle Facts
The sum of all the internal angles of a triangle is always 180o no matter how the triangle is constructed.
The length of any side of a triangle is shorter than the sum of the other two sides.
A triangle can always be split into two right triangles no matter how the triangle is constructed.
Different triangles
Acute triangle
All of the angles are less than 90o.
Obtuse triangle
one of the angles is greater than 90o.
Equilateral triangle
A triangle is called an equilateral triangle when all 3 sides are equal in length. These are normally 60o
Isosceles triangle
A triangle is called an isosceles triangle when two sides are equal in length
Scalene triangle
When all three internal angles are different from one another it is a Scalene Triangle.
Trigonometry study of math origins dates back to the ancient Egyptians.
Unknown Sides
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