# Rectangle 49153

Rectangle ABCD, whose | AB | = 5cm, | AC | = 8 cm, ∢ | CAB | = 30 °. How long is the other party, and what is its area?

## Correct answer:

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

**arithmetic**- square root
**planimetrics**- Pythagorean theorem
- right triangle
- area of a shape
- triangle
- rectangle
**goniometry and trigonometry**- sine
- cosine
- arcsine

### Units of physical quantities:

### Grade of the word problem:

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