3 years ago

Reflex angle 60degree

Mathematics

1 answer:

Natalija [7]3 years ago

3 0

120 degrees is the answer

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Answer:

The measure of angle A is $101\°$

Step-by-step explanation:

we know that

Applying the law of cosines

$a^{2} =b^{2}+c^{2}-2(b)(c)cos(A)$

substitute the values and solve for cos(A)

$31^{2} =22^{2}+18^{2}-2(22)(18)cos(A)$

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