Respuesta :

choixongdong
A = (a+b)/2 (h)
2A = (a+b) h 
a +b = 2A/h
a = 2A/h - b

answer is D.
a = 2A/h - b
RealIceCube

Answer:

a = 2A/h - B

Step-by-step explanation:

Confirming the other answer!