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2 years ago

Help with this please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Crank2 years ago

5 0

Answer:

m∡A = 41.4°

m∡B = 48.6°

m∡C = 90°

a = 3 $\sqrt{7}$

b = 9

c = 12

Step-by-step explanation:

to find the length of side 'a' I used the Pythagorean Theorem to get:

a² + 9² = 12²

a² + 81 = 144

a² = 63

a = $\sqrt{63}$ which equals $\sqrt{9}$ $\sqrt{7}$ which is 3 $\sqrt{7}$

to find m∡B I found the arcsin(B) = 9/12 to get 48.6

to find m∡A I subtracted the sum of 90 + 48.6 from 180°

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