Question

Calculate the value of a.

Answer 1

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°

Answer 2

a=20

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