Answer:
15
Explanation:
Do 25 ^ 2 = 625
Do 20 ^ 2 = 400
Because you're finding something that's nor the hypotenuse you subtract
So you do 625 - 400 = 225
Then you do the square root of 225 to get the answer
Which is 15
Let 'l' be the length of the other leg
Using pythagoras theorem,
25² = 20² + l²
625 = 400 + l²
225 = l²
l = 15
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