jika sudut ptq=40°dan sudut trs=65°,maka tentukan besar sudut tpq,tsr,tqp,qsr,dan prs

tpq=trs=65°
tsr=180°-(65°+40°)
= 75°
tqp=tsr=75°
qsr=180°-75°
=105°
prs=180°-65°
=115°