Solve
x = 16.5*, y = 48*
Prove
BL = CM
/_DLB = /_DMC (Both are 90*)
/_BDL = /_ CDM (Vertically opposite angles)
AAS congruency
BD = CD (csct)
By which test is triangle ABC congruent to triangle PQR
Side-side-side
State by which test of congruency are the two triangles congruent.
Side-angle-side