Question

find the value of a in each of the following cases.

Answer 1

Answer: 60 and 5

Step-by-step explanation:

Answer 2

Part a) a = 60  

Part b)  a = 5

Step-by-step explanation:

Part a)

Exterior angle theorem:

a + (180-2a) = 120

            -a = 120 - 180

            -a = -60

             a = 60

Part b)

Exterior angle theorem:

4a + (180-60) = 140

4a + 120 = 140

4a = 20

a = 5