# Touch circle

Point A has a distance (A, k) = 10 cm from a circle k with radius r = 4 cm and center S.

Calculate:

a) the distance of point A from the point of contact T if the tangent to the circle is drawn from point A

b) the distance of the contact point T from the line SA

Calculate:

a) the distance of point A from the point of contact T if the tangent to the circle is drawn from point A

b) the distance of the contact point T from the line SA

### Correct answer:

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

**geometry**- Thales' theorem
**planimetrics**- Pythagorean theorem
- right triangle
- circle
- area of a shape
- triangle
- The right triangle altitude theorem

#### Units of physical quantities:

#### Grade of the word problem:

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