Which of the following is the best definition of a perpendicular bisector? a) a perpendicular bisector intersects a segment at its midpoint. b) a perpendicular bisector intersects a segment at a 90-degree angle. c) a perpendicular bisector divides an angle into two congruent angles. d) a bisector intersects a segment at its midpoint and at a 90-degree angle.

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle. what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle. what is the measure of angle a? enter your answer in the box. m∠a= 3.)quadrilateral abcd is inscribed in this circle. what is the measure of angle b? enter your answer in the box. m∠b= °4.)quadrilateral abcd is inscribed in this circle. what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle. what is the measure of angle c? enter your answer in the box.°