One of the sides of the rectangle is 15cm, and its diagonal is 17cm. Find the area of a rectangle.
| September 5, 2021 | education
Find AB by the Pythagorean theorem from △ ABC:
AB = √ (AC² – BC²) = √ (17² – 15²) = 8.
Thus, the area of the rectangle is
S = AB ⋅ BC = 8 ⋅ 15 = 120 (cm²).
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