In triangle abc, ab = 12 inches, ac = 18 inches and the area of the triangle is 107.737 square inches. what is the measure of angle a? a) 1.5° b) 43° c) 86° d) 172°

(C)

Step-by-step explanation:

It is given that In triangle ABC, AB = 12 inches, AC = 18 inches and the area of the triangle is 107.737 square inches.

Now, using the formula where a and b are the two sides of the triangle and the C is the included angle, therefore

We have AB=12 in and AC=18 in and area= 107.737 square inches.

Substituting these values in the above equation, we get

≈

Thus, option (C) is correct.

just do 5.2 + 2 ( 7.2) and 1/3 x 3 (.9) and youv'e got your equation. 0.9( 9/10) + 7.2 ^2 = 16.4 hope i could !

step-by-step explanation:

here is your mark brainliest