Mathematics Question and Solution
Area blue total, exactly in cm² decimal is;
Area trapezoid with parallel sides (80/7) cm and ((80/7)+21.4285714284) cm, and height 20 cm - Area trapezoid with parallel sides 20 cm and ((80/7)+12.2448979591) cm, and height (60/7) cm - Area triangle with height (80/7) cm and base 12.2448979591 cm.
= (½*20((80/7)+((80/7)+21.4285714284))) - (½*(60/7)(20+((80/7)+12.2448979591))) - (½*(80/7)*12.2448979591)
= 442.857142855 - 187.172011662 - 69.9708454806
= 185.714285712 cm²
= 185.71 cm² to 2 decimal places.
