Math question please help!!?

Question

An A-frame cabin has a triangular front with a base of 30 ft and a

height of 20 ft. If the front is to be glass that costs $3 per square foot, what will the

glass cost?

Answer 1

Area of a triangle is half base times height right? So do that and times by 3 for the cost

Answer 2

the area of a triangle is found by:

A=(1/2)(b)(h)

where b is the base of the triangle and h is the height

So:

A=(1/2)(30)(20)

A=(1/2)(60)

A=30 sq. ft.

30($3 per sq. ft.)=$90