If diagonals of a parallelogram are perpendicular to each other, this is a rhombus. A rhombus has all sides equal. In the current scenario, the shorter rhombus is 20 cm long and has a perimeter of 80 cm
Side of rhombus = 80/4 = 20 cm A quarter of rhombus is right angled triangle with hypotenuse being side of rhombus. Half length of long diagonal = sqrt (20^2-10^2) = 17.32 cm Length of longer rhombus = 17.32*2 = 34.64 cm
Remember the arc is equal to the central angle, so ab will equal angle APB. they told you angle APB is a right angle, how many degrees is this? that is what ab will be also:)
