Question

What is the length of side BC??? @cj49 (Round the correct answer to one decimal place). @nikato @OOOPS

Answer 1

Help me out please

Answer 2

You can use either the 40 degree angle or the 30 degree angle. You have those angles and you also have some lengths of the bases. Which do you prefer? You wiill get the same answer no matter which one you pick. 40 or 30?

Answer 3

the 40 angle @IMStuck

Answer 4

you can use tang here \(\Large \sf\color{blueviolet}{tan40=\frac{x}{20}}\)

Answer 5

yeah you can use either of two angles

Answer 6

OK THEN let's use 40. Like this:

Answer 7

Which trig identity relates the angle to the adjacent side and the side opposite it?