It's impossible to have an area in cubic units.
Find the area of an equilateral triangle that has a perimeter of 21 inches. Round the answer to one decimal place.
the answer is 32
For an equilateral triangle with side length a, area = (aÂ²âˆš3)/4, which for a= 6cm is 15.6 cmÂ² [rounded to 1 decimal place]
Area of equilateral triangle: 0.5*7*7*sin(60 degrees) = 21.2 square inches
not very round it is norrmaly a triangle
Area of equilateral triangle: 0.5*6*6*sin(60 degrees) = 15.6 square cm rounded
6.5- you round it until it has one decimal.