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3 years ago

Round to the nearest tenth if necessary

Mathematics

1 answer:

GREYUIT [131]3 years ago

8 0

Answer:

Step-by-step explanation:

a=30

b= 17

c= 18

we actually already found angles B and C for the last problem I think we said 30 and 32 so we would be able to guess that angle A is about 118° but.. let's do the math... and see

angle A = arcCos[ b^2 + c^2 - a^2 / 2*b* c ]

A = arcCos[ 289 +324 - 900 / 2*17*18]

A = arcCos[ -287 / 612 ]

A = arcCos[ -0.468954 ]

A = 117.9664 °

ohh and we're off by 0.0336 phooy :P soo far off... :P

rounding to nearest 10th

A = 118.0 ° ( ohh right on the money :P) yay, I feel better. :P

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