Question

In a quadrilateral PQRS ..the bisectors of angle R and angle S meet at point T .show that angle P + angle Q = 2 angle RTS

Answer 1

so here it begins, ang.p+ang.q=360-ang.sr
or 2(180-ang.Sr/2)
or 2{180-(s/2+r/2)}
or 2 ang.rts ( angle sum property)