Consider the 2 trianglez mnp and prq
Proof:
S) Mp=pr(p is the midpoint or given)
A) MPN=QPR(vertically opposite angles)
S) Qp=PN(p is the midpoint or given)
Thus, both triangles are congruent by SAS
Homologes elements:
Sides: ANGLES:
QR=MN. NMP=PRQ
MNP=PQR