press space for a question it will draw a triangle, rectangle, trapezoid or semi-circle. These are the formulas: area of triangle = 1/2 * b * h L1 = base L2 = height area of rectangle = b * h L1 = base L2 = height area of trapezoid= (b1+b2)/2 * h L1 = base1 L2 = height L3 = base2 area of semi-circle = fraction * pi * radius^2 L1 = radius
