Question

write the formula for the area of a triangle, A = 1/2bh in terms of h. Find the height of a triangle when A = 18 in.² and b = 9 in. Please give explanation thank you :)​

Answer 1

`\\ \rm\Rrightarrow A=(1)/(2)bh`

`\\ \rm\Rrightarrow bh=2A`

`\\ \rm\Rrightarrow h=(2A)/(b)`

Now

• A=18in^2
• b=9in

`\\ \rm\Rrightarrow h=(2(18))/(9)`

`\\ \rm\Rrightarrow h=(36)/(9)`

`\\ \rm\Rrightarrow h=4`

Answer 2

2A/b = h

4 inches = h

Explanation:

A = 1/2bh in terms of h

Multiply each side by 2

2A = bh

Divide by b

2A/b = h

Let A = 18 and b = 9

2*18/9 = h

4 = h