The formula for area of a rectangle is A = bh. If b is the starting base, 0.75b is the base of the new triangle. If h is the starting height, 0.75h is the height of the new triangle.
This leaves us with the equation A = 0.75b(0.75h)
Let's solve this equation.
A = 0.75b(0.75h)
A = 0.5625bh
bh in this equation represents the original area (384 m), so we can plug this in to find the area of the new triangle.
A = 0.5625bh
A = 0.5625(384)
A = 216
Answer:
The area of the new triangle is 216 m².