Help please! hi this is my last question and i'm need of some help it's been sort of not clicking!

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

Which of the following can be used to explain a statement in a geometric proof?

The domain of a function can be represented by which one of the following options? o a. a set of output values o b. a set of f(x) values o c. a set of input values o d. a set of both input and output values