# Tropics and polar zones

What percentage of the Earth's surface lies in the tropical, temperate, and polar zone?

Tropics border individual zones at 23°27' and polar circles at 66°33'.

Tropics border individual zones at 23°27' and polar circles at 66°33'.

## Correct answer:

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See also our trigonometric triangle calculator.

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

**algebra**- expression of a variable from the formula
**solid geometry**- sphere
- surface area
- spherical cap
**planimetrics**- right triangle
- triangle
**basic functions**- percentages

### Units of physical quantities:

### Grade of the word problem:

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