# Trapezoid 65644

In an isosceles trapezoid, the base ratio a / c = 9/7, arm b = 10 cm, height v = 8 cm. Calculate the area of the trapezoid in cm².

## Correct answer:

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### You need to know the following knowledge to solve this word math problem:

**algebra**- equation
- system of equations
**arithmetic**- square root
**planimetrics**- Pythagorean theorem
- right triangle
- area of a shape
- trapezoid
**basic functions**- ratio
**numbers**- fractions

### Units of physical quantities:

### Grade of the word problem:

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