# R triangle

Calculate the right triangle area whose longer leg is 7 dm shorter than the hypotenuse and 10 dm longer than the shorter leg.

## Correct answer:

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

**algebra**- quadratic equation
- inequalities
- equation
- system of equations
**arithmetic**- square root
**planimetrics**- Pythagorean theorem
- right triangle
- area of a shape
- triangle

### Units of physical quantities:

### Grade of the word problem:

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