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Ilya [14]
3 years ago
12

In triangle XYZ, XY = 14, YZ = 22, and XZ = 26. What is the measure of angle Z to the nearest degree?

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
7 0

Answer:

<h2>D</h2>

WE ARE GOING TO USE THE COSINE RULE

{c}^{2} =  {a}^{2}  +  {b}^{2}  - 2ab \cos(c)

Take the sides as shown in the picture as a,b and c . Substitute the side by using the cosine rule.

{14}^{2}  =  {22}^{2}  +  {26}^{2}  - 2(22 \times 26) \cos(z)

196 = 1160 - 1144 \cos(z)

1144 \cos(z) = 1160 - 196

\cos(z)  =  \frac{964}{1144}

z =   \frac{1}{ \cos} 0.842657342

1 over cos means cos inverse.

z = 32.5 nearest \: degree \\  = 33degrees

ANSWER 33°

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