Tetrahedral pyramid

Calculate the regular tetrahedral pyramid's volume and surface if the area of the base is 20 cm² and the deviation angle of the side edges from the plane of the base is 60 degrees.

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

arithmetic

square root

solid geometry

pyramid
surface area

planimetry

Pythagorean theorem
right triangle
area of a shape
triangle
square
diagonal
quadrilateral

goniometry and trigonometry

tangent

Units of physical quantities

unit conversion
volume
angle

Grade of the word problem

practice for 14 year olds
high school

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