The Pythagorean Theorem:
In a right triangle, the square of the hypotenuse is equal to the
sum of
the squares of the legs.
c²= a²+ b²
Theorem:
If the square of one side of a triangle is equal to the sum of
the
squares of the other sides then the triangle is a right triangle.
Theorem:
If the square of the longest side of a triangle is greater than
the sum
of the squares of the other two sides then the triangle is an
obtuse
triangle.
Theorem:
If the square of the longest side of a triangle is less than the
sum of
the squares of the other two sides then the triangle is an acute
triangle.
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