Question

a = \frac{1}{2}bh
what are the actual base and height of the trampoline?
actual base =
actual height =
1 in.:4 ft

Explanation:

Step1: Use the scale - factor conversion for base

The scale is 1 in. : 4 ft. The base in the drawing is 2.5 in. Multiply the drawing - base by the scale factor.
$2.5\times4$

Step2: Use the scale - factor conversion for height

The height in the drawing is 3 in. Multiply the drawing - height by the scale factor.
$3\times4$

Answer:

Actual base = 10 ft
Actual height = 12 ft