For a trapezoid, the following formula relates the area a, the two bases a and b, and the height h. a= g (a
b./2 solve for b
a. b= ah/2-a
b. b= 2a-a/h
c. b= 2a/h a
d. b= 2a/h-a

Right ∆abc has coordinates a(-7, 3), b( -7, 10), and c(-1, 3). the triangle is reflected over the x - axis and then reflected again over the y - axis to create ∆a'b'c'. which are the coordinates of vertex a'?