# Determine 79364

Given a general triangle ABC. Its perimeter is 30 cm, with side a=2 cm longer than side b and 5 cm shorter than side c. Determine the area of the triangle.

## Correct answer:

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

**algebra**- equation
- system of equations
- expression of a variable from the formula
**arithmetic**- square root
**planimetrics**- area of a shape
- perimeter
- triangle
- Heron's formula

### Units of physical quantities:

### Grade of the word problem:

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