# Circumference 7823

The bases are 9 cm and 5 cm long in a rectangular trapezoid. The length of the shorter arm is 3 cm. Calculate its circumference and area.

### 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**- Pythagorean theorem
- right triangle
- area of a shape
- perimeter
- triangle
- trapezoid

#### Units of physical quantities:

#### Grade of the word problem:

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