you can find the area of the triangle using
(a) Heron's formula
or
(b) A = 1/2 ab sinC (and c^2 = a^2+b^2-2ab cosC to find C)
And the volume is just A * 2/12 ft^3
Joseph is building a triangular shaped planter in his front lawn. The sides of the planter will be 6 feet, 7 feet and 11 feet. The planter will be filled with soil 2 inches deep. How many cubic feet of soil will he need? Round up to the nearest hundredth.
1 answer