# Tetrahedral pyramid

Calculate the regular tetrahedral pyramid's volume and surface if the area of the base is 20 cm

^{2}and the deviation angle of the side edges from the plane of the base is 60 degrees.## Correct answer:

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Try conversion angle units angle degrees, minutes, seconds, radians, grads.

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

**arithmetic**- square root
**solid geometry**- pyramid
- surface area
**planimetrics**- Pythagorean theorem
- right triangle
- area of a shape
- triangle
- square
- diagonal
- quadrilateral
**goniometry and trigonometry**- tangent

### Units of physical quantities:

### Grade of the word problem:

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