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N76 [4]
3 years ago
8

The following figure shows A ABC with side lengths to the nearest tenth.

Mathematics
1 answer:
xz_007 [3.2K]3 years ago
3 0

Answer:

17.7

Step-by-step explanation:

angle B = 180 - 81 - 65 = 34 degrees

as the sum of all angles in any triangle is always 180 degrees.

a/sin(A) = b/sin(B) = c/sin(C)

the sides are always on the opposite side of the angle.

so,

10/sin(34) = AB/sin(81)

AB = 10×sin(81) / sin(34) = 17.7

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