Imagine that you do not have a calculator at hand (but you have a compass and a ruler or square) and you need to calculate the result as a line segment. The problem is solved in less than 5 easy steps.
Basic calculation formula
To begin with, we will prove one formula that will help us with a further solution.
In a right-angled triangle, ABC
draw the height h
to the side C
. By the Pythagorean theorem, we deduce:
We substitute everything in the first formula:
And if you expand the brackets:
After reduction we get:
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