Determine the area of a right-angled triangle if its hypotenuse is 20 cm and one of the legs is 12.
| December 11, 2020 | education
1) First, we find the second leg according to the Pythagorean theorem:
20 ^ 2-12 ^ 2 (all under the root) =
400-144 (all under the root) =
256 (under the root) = 16
2) Find the area:
S = leg × leg × 1/2 = 12 × 16 × 1/2 = 96.
Answer: 96
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