What is the value of a?

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round only your final answer to the nearest whole number.

a = 15

Step-by-step explanation:

The Law of Cosines

a^2 = 13^2 + 14^2 - 2(13)(14)Cos(67.4)

a^2 = 169 + 196 - (364 * 0.3843)

a^2 = 365 -140

a^2 = 225

a = 15

For this case, we have by definition the law of cosine states that:

We have to:

Substituting:

Rounding off we have:

step-by-step :

4.

step-by-step explanation:

it have the same area.brainliest