Question

what is the value of a in the figure below?
a 90
b 100
c 110
d 120

Explanation:

Step1: Use the straight - angle property

A straight - angle measures \(180^{\circ}\). So, \(a + 70=180\).

Step2: Solve for \(a\)

Subtract \(70\) from both sides of the equation \(a + 70=180\). Then \(a=180 - 70\).

Answer:

C. \(110\)