# Right-angled triangle

Determine the area of a right triangle whose side lengths form successive members of an arithmetic progression, and the radius of the circle described by the triangle is 5 cm.

## Correct answer:

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

**algebra**- quadratic equation
- equation
- arithmetic progression
- expression of a variable from the formula
**planimetrics**- right triangle
- circle
- area of a shape
- triangle

### Units of physical quantities:

### Grade of the word problem:

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