the diameters of circle is the longest chord of a circle. equal chord of a circle have the equal circumference. the radius drawn perpendicular to the cord bisect the chord...the distance from the center of the circle to the longest chord ( diameter) is zero
Area= a*height the formula for an isosceles trapezoid is 1/2(base1+base2)*height. 1/2 base 2 and 2a will simplify to a base length of a. a times height or a*height
