In a rectangular trapezoid, the sides are 15 and 9 cm. The larger base is 20 cm. Find the area.
| September 8, 2021 | education
1. The height of the trapezoid is equal to the smaller lateral side.
2. Determine the size of the leg of a right-angled triangle.
15 ^ 2. – 9 ^ 2. = √ (225 – 81) = √144 = 12 centimeters.
3. Find the bottom base.
20 – 12 = 8 centimeters.
4. Let’s calculate the area.
(20 + 8) / 2 * 9 = 126 cm ^ 2.
Answer: 126 square centimeters.
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