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3 years ago

7

Plz solve i beg i really need help i beg u guys

1 answer:

Dmitry_Shevchenko [17]3 years ago

4 0

check the picture below.

if ∡F = 90° and ∡D = 30°, then the ∡A = 60°, meaning the triangle is a 30-60-90 triangle and therefore we can use the 30-60-90 rule as you see in the picture.

$\bf \textit{area of a triangle}\\\\
A=\cfrac{1}{2}bh~~
\begin{cases}
b=base\\
h=height\\[-0.5em]
\hrulefill\\
h=7\sqrt{3}\\
b=7
\end{cases}\implies A=\cfrac{1}{2}(7)(7\sqrt{3})
\\\\\\
A=\cfrac{49\sqrt{3}}{2}\implies A\approx 42.43524478543749369142$

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