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With a ruler and a brain. o_O
OR, (lol), use the Pythagorean theorem, e.g.:
a2+b2=c2
Let A be one leg (short side), B the other leg, and C the hypotenuse (long side).
So if the measurements of the two short sides (a and b) are say, 3 and 4 , then you do:
3*3=9
4*4=16
therefore
9+16=c2
So then, it is: 25=c2
Assuming one already knows basic algebra, take the square root of both sides of the equation to get:
(square root of 25)=(square root of 'c')2
And since the square root of C squared is simply C, we know that C is equal to the square root of 25, which is 5.
Therefore, the missing side (C) is 5 units. Knowing algebra you can use the same equation to find any side (with any given side lengths), but C is the most common in math books.
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∙ 12y ago
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The depends on what the missing measurement is. From here, I can see at leastthree missing measurements . . . the height of the triangle, and the lengths of theother two sides. The method needed in order to find the 'missing measurement'depends entirely on which one of those you're asked to find.Here's a formula that may come in handy. If not, just put it away for later.Area of a triangle = 1/2 (Base times Height)
How do you find the length to a missing side of a right triangle?
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