ANSWER AS SOON AS POSSIBLE PLEASE: Which of the following statements about using a protractor are correct?

The protractor measures angles up to 90°.
The vertex of the angle must be at the 0° mark.
One ray of the angle must point at 0°.
The protractor measures angles that open from left or from the right.

a

Step-by-step explanation:

the protractor measure angle up to 90° and more

anser is a

step-by-step explanation:

negitive slope

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47