PLEASE HELPPim confused​

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

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.

Find the measure for the angle indicated in bold