Volume of regular tetrahedron of given length of edges
Problem
Determine the volume of a regular tetrahedron of edge 2 ft.
| A. 1.54 ft3 | C. 1.34 ft3 |
| B. 1.01 ft3 | D. 0.943 ft3 |
regular tetrahedron
016 Radius of the sphere circumscribing a regular triangular pyramid
Example 016
Find the area of the surface and the volume of the sphere circumscribed about a regular tetrahedron of edge 25 cm. See Figure 015.
014 Water poured into a jar of marbles
Example 014
A boy who had discovered that 20 mm marbles fitted snugly into the bottom of a cylindrical jar, dropped in a fourth on top of the three and poured water enough into the jar to just cover them. How much water did he use?
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