Question

slove it urgent 9th no.

Answer 1

sum of angles of a quadrilateral = 360°
therefore,a+b+c+d=360°
a+b+100°+60°=360
a+b+160°=360°
a+b=360°-160°
a+b=200°
IT IS A EQUILATERAL TRIANGLE
SO,200°/2=100 °
so,angle pab=100°,angle pba=100°and
angle apb=100°

Answer 2

search on Google u will be get your answer