The area of the trapezoid is calculated through the equation, A = 0.5(b₁ + b₂)h where A is area, b₁ and b₂ are the lengths of the bases and h is the height. Substituting the known values, A = 0.5(15 m + 19 m)(10 m) A = 170 m² The area of the garden is 170 m².
Since it is an isosceles triangle we know that one of the angles will be 72 degrees as well. I added both of the 72s and got 144. A triangle has 180 degrees. Subtract 144 from 180 and you get 36.
