Find the area of a right-angled triangle if the leg is 20 cm and the hypotenuse is 25 cm.
| September 12, 2021 | education
S = 1/2 a * b, a = 20, c = 25 by the Pythagorean theorem, we find the second leg b ^ 2 = c ^ 2 – a ^ 2,
s ^ 2 = 625 – 400 = 225, s = 15, S = 1/2 * 15 * 20 = 150 cm2.
Answer: the area of a right-angled triangle = 150 cm2.
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