Question

99 PIONTS PLEEEAAAAASSSEEEE HHHEEEELLLLPPP

Answer 1

`\boxed{A= (leg_1 * leg_2)/(2) } \\ \\ 18= (6 * (h+1))/(2) \\ \\ 18=3 * (h+1) \\ \\ 18=3h + 3 \\ 3h=18-3 \\ 3h=15 \\ \boxed{h=5}`

Answer 2

1/2 × (h + 1) × 6 = 18 [multiply 1/2 and 6, then divide my 18]
(h + 1) = 6 [subtract 1 from 6]
h = 5

Now seeing if it's correct; 1/2 × (5 + 1) × 6 = 18

Hope this helped! :)