# Two chords

In a circle with a radius of 8.5 cm, two parallel chords are constructed, the lengths of which are 9 cm and 12 cm. Find the distance of the chords in a circle.

### 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
**arithmetic**- absolute value
- subtraction
**planimetrics**- Pythagorean theorem
- right triangle
- circle
- triangle
- chord

#### Units of physical quantities:

#### Grade of the word problem:

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