Answer:
3.7
Step-by-step explanation:
.
I don't know sorry it even very hard and diffult for a high school kid
You have to make an equation
Make everything equal to 180 degrees because a triangle makes 180 degrees
If you need more help I can assist you
1.
420 = 1/4 so 4/4 is 4 420s
420 x 4 = 1680
I think it is D..
BMK