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miskamm [114]
3 years ago
15

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

Mathematics
1 answer:
Crank3 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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