3. Use compasses straightedge to construct a perpendicular bisector of segment AB and justify your construction. Justification: On the construction, quadrilateral APBQ is a kite, for and have the same radii. To validate your construction: by construction, i.e., in each of the both pairs , for (construction); ; and (construction); by SSS congruence condition. Therefore, 41 2 (CPCF) (mark the angles 1 and 2 on your construction) , for L2 (provedabove); and : by SAS congruence condition. (construction);  _a_ Therefore, m· ; and (CPCF)·The construction is indeed a perpendicular bisector ofAB 
We have given line segment AB. We have to construct the perpendicular bisector of it using compass.
 We follow the following steps to construct it ---
 (1) First set your compass equal to three-fourth of length AB.
 (2) First put the compass at A and cut two arcs at both side of AB.
 (3) Same as cut two arcs from B also.
 (4) Now match the two points where these arcs intersect.
 So this line is your perpendicular bisector of AB.