# Circumference 26361

The ABCD diamond has a circumference of 72 cm. The longer diagonal of the animal with the line segment AB angle is 30 °. Calculate the area of the ABCD diamond.

### Correct answer:

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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
**planimetrics**- right triangle
- area of a shape
- triangle
- rhombus
- diagonal
**goniometry and trigonometry**- sine

#### Units of physical quantities:

#### Grade of the word problem:

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