Which term best describes lines that intersect at a 90 degree angle?

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

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.

Full year - williamshow many square inches are in 60 square feet? 5 square inches72 square inches720 square inche8.640 square inches