Step-by-step explanation:
according to the property of the parallelogram m(OPE)=m(OHE), then 2x+25=3x-15, then (after calculation the 'x'):
1. x=40;
2. m(OHE)=2*40+25=105°;
3. m(OPE)=3x-15=3*40-15=105°;
4. m(HOP)=180-m(OPE)=180-105=75°;
5. m(HEP)=m(HOP)=75°.
