Question

Please help me I need to finish

Answer 1

The given triangle is a Right angled triangle,

By applying trigonometry :

$\boxed{\tan( \theta) = \frac{opposite \: \: side}{adjacent \: \: side} }$

• $\tan(45 \degree) = \dfrac{7}{a}$

• $1 = \dfrac{7}{a}$

• $a = 7$

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