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Keith_Richards [23]
3 years ago
6

A triangle has a square on its three sides as shown below. What is the value of x

Mathematics
2 answers:
PtichkaEL [24]3 years ago
4 0

das is part of a proof of pythagorean theorem


for a right triangle (has one interior angle as 90 degrees)

a^2+b^2=c^2

a and b are the lengths of the legs and c=length of hypotnuse (side oposite right angle)


we see that the lengths of the legs are 9in and 12in

a=9 and b=12 (or a=12 and b=9, doesn't matter)

we want to find c, or x in this case

so

a^2+b^2=c^2

9^2+12^2=x^2

81+144=x^2

225=x^2

15=x

x=15in

answer is 15 inches

anygoal [31]3 years ago
3 0

using the pythagorean theorem

a^2+b^2 = c^2   where c is the hypotenuse

9^2 +12^2 = x^2

81 + 144 = x^2

225 = x^2

taking the square root of each side

sqrt(225) = x

15 =x

x = 15 inches

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