jgully02p40a4l jgully02p40a4l
  • 04-04-2018
  • Mathematics
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HELP QUICK!! GIVING BRAINLIEST

What is this measure of
17 degrees

33 degrees

57 degrees

73 degrees

HELP QUICK GIVING BRAINLIEST What is this measure of 17 degrees 33 degrees 57 degrees 73 degrees class=

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thespeedo2346oqvsen
thespeedo2346oqvsen thespeedo2346oqvsen
  • 05-04-2018
Draw a perpendicular line with BC from A

The line will bisect BC, and is angle A's bisector.

Call the point that bisects BC with the line is D => DAC=DAB=1/2 angle A

=> DC = 1/2*BC = 2m

=> sinDAC = DC/AC = 2/7

=> angle DAC = sin^-1(2/7) = 16.6 degrees

=> angle A = 2*DAC = 16.6 * 2 = 33.2 degrees (approx. 33 degrees)

Conclusion: B) Angle A is 33 degrees

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