________
a² = c² - b²
a² = 25² - 20²
a² = 625 - 400
a² = 225
a = √225
a = 15
Answer:
15
Explanation:
(Side)^2 = (Hypotenuse)^2 - (Side)^2
(Side)^2 = (25)^2 - (20)^2
(Side)^2 = 625 - 400
(Side)^2 = 225
Side = √225
Side = 15
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