In a rectangle, one side is 13 and the other side is 9. Find the diagonal and area of the rectangle.
| January 30, 2021 | education
The area of the rectangle is: S = AB * BC = 9 * 13 = 117 cm2.
In a right-angled triangle ABC, according to the Pythagorean theorem, we determine the length of the hypotenuse AC.
AC ^ 2 = BC ^ 2 – AB ^ 2 = 169 – 81 = 88.
AC = √88 = 2 * √22 cm.
Answer: The area of the rectangle is 117 cm2, the diagonal is 2 * √22 cm.
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