# Diamond diagonals

Calculate the diamond's diagonal lengths if its area is 156 cm

^{2}and the side length is 13 cm.## Correct answer:

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

**algebra**- quadratic equation
- system of equations
- expression of a variable from the formula
**planimetrics**- Pythagorean theorem
- area of a shape
- rhombus
- diagonal
- The Law of Sines

### Units of physical quantities:

### Grade of the word problem:

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