SOLUTION: ABC is a triangle
ADC is a straight line with BD perpendicular to AC
AB = 7 cm
BC = 12 cm
angle BAD =65 degrees
calculate the length of ac
give your answer to 3 significa
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-> SOLUTION: ABC is a triangle
ADC is a straight line with BD perpendicular to AC
AB = 7 cm
BC = 12 cm
angle BAD =65 degrees
calculate the length of ac
give your answer to 3 significa
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Question 1068310: ABC is a triangle
ADC is a straight line with BD perpendicular to AC
AB = 7 cm
BC = 12 cm
angle BAD =65 degrees
calculate the length of ac
give your answer to 3 significant figures
thank you. Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website! angle ABD = 90 - 65 = 25 degrees
:
cos(65) = AD / 7
AD = 7 * cos(65) = 2.9583
:
cos(25) = BD / 7
BD = 7 * cos(25) = 6.3442
:
BD^2 + DC^2 = BC^2
(6.3442)^2 + DC^2 = 12^2
DC^2 = 12^2 - (6.3442)^2 = 103.7511
DC = square root(103.7511) = 10.1858
:
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AC = AD + DC = 2.9583 + 10.1858 = 13.1441 approximately 13.144
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