SOLUTION: how to get an area of square? how to get an area of rectangle? how to get an area of triangle? how to get an area of trapezoid? how to get an area of circle?

Question 789848: how to get an area of square?
how to get an area of rectangle?
how to get an area of triangle?
how to get an area of trapezoid?
how to get an area of circle?
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
Square - all four sides of a square are equal in length, let s be one side then the area of a square is s*s = s^2
Rectangle - a rectangle has a length and a width so two sides have the same length (l) and two sides have the same width (w), area or rectangle is l * w
Triangle - the triangle has three sides, let one be the base (b) and the heigth (h) is perpendicular to the base and meets the intersection of the other two sides, area of triangle = 1/2 * b * h
Trapezoid - A trapezoid has four sides, two of them are parallel. Let the two parallel sides be b1 and b2 and a perpendicular line between b1 and b2 is the height (h). Then the area of the trapezoid is 1/2 * (b1 + b2) * h
Circle - The circle has a radius (r) and the area of the circle is pi * r^2 where an approximation for pi is 22/7

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