What is a Right angled triangle?

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Right angled triangle: 
 Right angled triangle is a triangle in which one angle is a right angle (that is, a 90-degree angle).

# The relation between the sides and angles of the right angled is the basis for trigonometry.

#Pythagoras Theorem states that The square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of other two sides. 

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