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NFMZombie
29.05.2021 •
Mathematics
Help ASAP! It’s due and thanks
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Ответ:
C
Step-by-step explanation:
It can't be B or D, because there is only a difference in the X axis (Meaning it goes either left or right)
It can't be A because 2 is less than 11, so (2, -1) would be left 9 units in relation to (11, -1)
Ответ:
(You should know that a triangle has 180°, as well.)
First: We know that m∠A = 20°. We know that m∠B = m∠C. And finally, we know that m∠A + m∠B + m∠C = 180. Since m∠B = m∠C, we can substitute one for the other. Let's say that m∠B = x, just for clarity's sake. We end up with:
20 + 2x = 180
2x = 160
x = 80°
This means that m∠B and m∠C = 80°.
To solve for AC, we can use the Law of Sines (which is ). Substitute 20 for A, 4 for a, 80 for B, and AC for b.
Cross-multiply:
Divide both sides by .
And finally, solve: