_a p_ + _q c_
-------------
2
multiplied by the true slope length of _t v_, or _t v′_, which measures
15.2 feet. Substituting dimensions, the area is found to be
6 + 24
------ × 15.2 = 228 square feet.
2
From this deduct the area of _y z u_, which is the portion covered by
the intersecting gable roof. The true length of _t u_ along the slope
is _t u′_, measuring 12 feet; hence, the area of _y z u_ is
14 × 12
------- = 84 square feet.
2
The net area of _a p q c_ is therefore 228 - 84 = 144 square feet; _b c
q w_ being equal to _a p q c_, its area is the same, making the area of
both sides 288 square feet.