Sunday

September 21, 2014

September 21, 2014

Posted by **Wayne** on Monday, September 12, 2011 at 10:47am.

How may cubic yards is this?

- Math -
**Dr Russ**, Monday, September 12, 2011 at 11:07amArea of an equilateral triangle is

l^2 Sqrt3/4

where l = length of a side.

convert figures to yards

11x11x11x1/6

area is then

11^2 x sqrt3/4 = 52.4 sq yards

volume = 52.4/6 = 8.73 cu yards

Please check my maths and remember to include the untis with your answer.

- Math -
**bobpursley**, Monday, September 12, 2011 at 11:09amAnother need way to find the area of any triangle is Heron's formula, you can memorize it easy enough, so you can find the area of any triangle knowing the sides.

http://mste.illinois.edu/dildine/heron/triarea.html

**Answer this Question**

**Related Questions**

math - find the base of the triangle of a triangular prism with a height of 8 ...

Math - Dirt must be removed for the foundation of a building that is 30 yards by...

math - The spring runoff from melting snow from a certain region is being ...

Math PLEASE HELP!!! - A contractor pours a sidewalk that is 4 inches deep, 1 ...

math - a new sidewalk will be 5ft wide 160ft long and 3ins deep.how many cubic ...

Math - 8. How many cubic feet are in 3 cubic yards? A. 27 cu. ft. B. 5,184 cu. ...

math - which units would be most appropriate for measuring the perimeter of a ...

math - concrete can be purchased cubic yard. How much will it cost to pour a ...

geometry - if I had a prism with the dimensions of 9 yards x 6 yards x 3 yards ...

Math - An owner determined that he needs 4 truck loads of bricks to build his ...