Answer:
42ft²
Explanation:
The area of the shaded region is 42ft² . What is the area of the unshaded region?
- taking the unit of measurement in the figure (ft) and not that of the text (cm)
are two congruent right-angled triangles that form a rectangle, therefore same Area (42ft ²)
OR
the rectangle is made up of two equal right-angled triangles, so just use the formula A = 1/2×b×h.
1/2 7 × 12 =
3.5 × 12 =
42ft²