Question

For the triangle shown, find:
a) Angle BCD
b) Angle DCA

Answer 1

any other properties given to the triangles?

Answer 2

Btw it's not a right triangle.
That's all that is given.

Answer 3

well you can use
law of sines

Answer 4

i think

Answer 5

Use the sine rule to find angle ADC, then angle DCA is easy to find (angles will add to 180).

Answer 6

sin30/20 = sin(ADC)/28

Answer 7

I did use the sine rule but I sorta got stuck in the middle . . .

Answer 8

oh wow . . . I was thinking wayyy to complicated then I needed . . . *facepalm* Thanks lol

Answer 9

To find BCD, find angle B first, you will use the same equation as above (it's the ambiguous case of the sine law).

You can find angle BDC since BDA is a straight line, and so BDC and CDA will add to 180. Then after getting that, you can find BCD.

Answer 10

Thanks a lot. I got it. ^^