
A right angle triangle is a triangle with, well a right angle in it. A right angle is a degree that equals to 90 degrees, while the whole triangle must equal and will always equal to 180 degrees. There is two types of right angle triangle, one being an Isosceles right angled triangle where one angle is a right angle, the other two angles are always 45° and have two equal sides. The other is a Scalene right angled triangle where one angle is a right angle and the other two are unequal angles with no sides equal either.

Pythagoras theorem is a ‘rule’ by a man named Pythagoras, who many, many years ago found an amazing fact about triangles. This fact was that ‘if the triangle had a right angle and you made a square on each of the three sides, then the biggest square had the exact same area as the other two squares put together’.
There is three sides to a triangle, a, b and c. C is always called the hypotenuse. The definition of the hypotenuse is ‘in a right angled triangle the square of the hypotenuse is equal to the sum of the squares of the other two sides’.
The formula for Pythagoras Theorem is a2 + b2 = c2 . This means the square of a (a²) plus the square of b (b²) is equal to the square of c (c²).
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