# Isosceles trapezoid

Calculate the area of an isosceles trapezoid whose bases are in the ratio of 4:3; leg b = 13 cm and height = 12 cm.

## Correct answer:

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Calculation of an isosceles triangle.

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

**algebra**- expression of a variable from the formula
**arithmetic**- square root
**planimetrics**- Pythagorean theorem
- right triangle
- area of a shape
- triangle
- trapezoid
**basic functions**- ratio

### Units of physical quantities:

### Grade of the word problem:

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