My teacher didn’t give us the formula for this special right triangle so i don’t know how to even do it

What is the value of r of the geometric series?

What is true about the dilation? it is a reduction with a scale factor between 0 and 1. it is a reduction with a scale factor greater than 1. it is an enlargement with a scale factor between 0 and 1. it is an enlargement with a scale factor greater than 1.

If angle 2=3x +1 and angle 3=2x +4what is angle 2