A= πr^2 find the value of A when π= 3.142 and r= 5

Which of the following vectors are orthogonal to (2,1)? check all that apply

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

In the picture below, line pq is parallel to line rs, and the lines are cut by a transversal, line tu. the transversal is not perpendicular to the parallel lines. note: figure is not drawn to scale. which of the following are congruent angles?