The formula for the area of a triangle is A = one-half b h. Hiro is solving the equation for h; his work is shown below. What mistake did Hiro make? A = one-half b h. 2 times A = 2 times (one-half b h). 2 A = b h. 2 A minus b = h.

Hiro should have divided both sides of the equation by 2.
Hiro should have divided both sides of the equation by b.
Hiro should have added b to both sides of the equation.
Hiro should have subtracted 2 from both sides of the equation.