In the diagram above calculate the value of x - JAMB Mathematics 2005 Question

In the diagram above calculate the value of x

p + 40^o = 100^o (exterior ∠ = sum of two interior opp ∠s)

p = 100^o - 40^o

P = 60^o

But q + p = 180^o (∠s on a straight line)

q + 60^o

q = 180^o - 60^o

q = 120^o

x = q (corresponding ∠)

∴x = 120^o