Answer:
x is half of the volume of the triangle because it can definitely fit inside the other triangle which means it's half
x = 13
Explanation:
Use pythagorean theorem. So say a is the side that's unknown
13^2 + a^2 = 17^2
a = √120 or 2√30
now do the same for the other triangle
( 2√30)^2 + 7^2 = x^2
120 + 49 = x^2
169 = x^2
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