tolong dibantu ya semuanya plisssssssss(penting)dan jawabannya harus benar oke!!!!!!!

1. a. PR=RS=12 cm
b.PT=PS : 2 =18:2= 9 cm
c.RPT=180°-(40°+90°)=50°
d.TSR=RPT=50°
e.SRT=PRT=40°
2. a.DE=FD=EF
b.DI=IF=HF=HE=GE=DG
c.EDF=DEF=EFD
d.F
e.F
3. a.KMN=LMN
b.MLN=MKN
c.NK=NL