What is the area, in square units, of triangle $ABC$ in the figure shown if points $A$, $B$, $C$ and $D$ are coplanar, angle $D$
is a right angle, $AC = 13$, $AB = 15$ and $DC = 5$?
1 answer:
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To find the length of the missing side x, use Tan trigonometric formula
Tan:
Tan 21 =
Tan 21 × =
×
x=27.4
X= 27.4 ft
Hope it helps!