Answer:
a=20
Step-by-step explanation:
5a+a+60+2a+140=360 (sum of angles at a point)
8a+200=360
8a=360-200
8a=160
a=160/8=20
Angles around a point = 360°
5a + (a+60) + (2a +140) = 360°
5a + a + 60 + 2a +140 = 360°
5a +a + 2a = 360-60-140
8a = 160
a= 20°
