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Chiurox · Answer 1 · 2021-02-13T05:16:53+0000

Answer:

a=6.9

Explanation:

Since you know that C is a right angle, you can use the Law of Sines to find a. The first step is to find the size of the angle A, which is 180-74-90=16. Now, you set up a ratio that involves 3 knowns and one unknown to get
$(\sin(90^\circ))/(25) = (\sin(16^\circ))/(a)$ , which after cross multiplying yields
$a=\sin(16^\circ)\cdot25\approx 6.9$ . PM me if you have any questions?

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