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alina1380 [7]
3 years ago
10

HELPPP!! Calculate the side lengths a and b to two decimal places. (there is a picture included)

Mathematics
1 answer:
lara31 [8.8K]3 years ago
8 0

Answer:

Option (D)

Step-by-step explanation:

In the given triangle ABC,

Sum of all interior angles = 180°

m∠A + m∠B + m∠C = 180°

72° + 85° + m∠C = 180°

m∠C = 180 - 157

m∠C = 23°

By applying Sine rule in the triangle,

\frac{\text{SinA}}{a}=\frac{\text{SinB}}{b}=\frac{\text{SinC}}{c}

\frac{\text{Sin72}}{a}=\frac{\text{Sin85}}{b}=\frac{\text{Sin23}}{6.2}

\frac{\text{Sin72}}{a}=\frac{\text{Sin85}}{b}=0.06302

\frac{\text{Sin72}}{a}=0.06302

a = \frac{\text{Sin72}}{0.06302} = 15.09

\frac{\text{Sin85}}{b}=0.06302

b = \frac{\text{Sin85}}{0.06302}

b = 15.81

Therefore, option (D) will be the answer.

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