Question

In triangle ABC, what is the measure of c if a = 12, b = 25, and C = 20°?

14.32

22.07

23.74

205.18

Answer 1

to find c side \[\huge\rm c^2 = a^2 +b^2 -2ab \times \cos(c)\]
replace by their values and then solve !

Answer 2

12^2+25^2-2(12)(25)xcos?

Answer 3

cos C = ??

Answer 4

20 de

Answer 5

yes right so replace C by 20 de

Answer 6

Sides: a = 12   b = 25   c = 14.324 (so the first answer is correct)

cos c ---> may be cos gamma

http://www.triangle-calculator.com/?what=&q=a+%3D+12%2C+b+%3D+25%2C+and+C+%3D+20%C2%B0&submit=Solve

Answer 7

I did get 14.324

Answer 8

though

Answer 9

are you sure ?

Answer 10

yea

Answer 11

i got different answer

Answer 12

I hope im right

Answer 13

what did you get ?

Answer 14

yes that's not right try again

Answer 15

careful about degree / radian stuff!

Answer 16

got 205

Answer 17

^ :-)

Answer 18

:-) = that's right