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given:
PQ perpendicular to MN
m< 1 = < 2
prove:
triangle PQR is congruent to triangle NQP
statement.......................................reason
1. PQ perpendicular to MN .............given
2. m< 1 = < 2 ..................................given
3. MQ=QN...............across equal angles lie equal sides
4. QP=QP............ ......common side
5.MP=NP.......................if two sides are equal (see 3 and 4), third sides are equal too
6. ∆ MPQ = ∆ NQP .............................SSS