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Troyanec [42]
3 years ago
14

Determine the length of chord BC. 1) 17.45 2) 30.96 3) 67.06 4) 33.53

Mathematics
1 answer:
boyakko [2]3 years ago
5 0

Answer:

33.53

Step-by-step explanation:

OB is a radius of the circle, and OC is also a radius of the circle, so both are equal length.  That makes ΔOBC an isosceles triangle.

If we cut ΔOBC in half, the angle formed is 125° / 2 = 62.5°.

Therefore:

sin 62.5 = (x/2) / 18.9

x = 37.8 sin 62.5

x ≈ 33.53

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