Making of a Right Triangle by Dr. Khin Maung Win (Maths)

MATHEMATICS 13

MAKING OF A RIGHT ANGLE

Euclid said that a right angle is formed when

two lines meet in such a way that the two adjacent angles, those angles lying side by side

are equal to each other.

figure of two right angles A and B

This definition gives us an effective yet

childlikely simple method of obtaining a right angle.It is a practical application of Euclid’s

definition.

picture of folding papers

Take a piece of paper.Fold it as shown in the

diagram.The fold will be a straight line.Then fold

it again so that the two parts of the line fall

exactly one on another also as shown.Then unfold the paper .The two folds will intersect at right angles.You will find four right angles.

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