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Solution 4.1:3a

From Förberedande kurs i matematik 1

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A right-angled triangle is a triangle in which one of the angles is 90. The side which is opposite the 90 -angle is called the hypotenuse (marked x in the triangle) and the others are called opposite and the adjacent.

With the help of Pythagoras' theorem, we can write a relation between the sides of a right angled triangle:


x2=302+402


This equation gives us that


x=302+402=900+1600=2500=25100=52102=510=50

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