Respuesta :

X^2+6^2=10^2
X^2+36=100
Subtract 36 from both sides
X^2= 64
X=8

answer=8

explaination

As this is a right angle triangle

use Pythagoras formula

a^2+b^2= c^2

c= 10 ( given)

b= 6

let's assume a= x

then substitute the values in the formula, we have

x^2 + 6^2= 10^2

x^2+ 36 = 100

x^2 = 100- 36

x= √64

x = 8

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