Question

In the figure, $AB\parallel CD\parallel EF$. Which of the following statements is true?

• A. $a+b={180}^{\circ }$
• B. $b+c={180}^{\circ }$
• C. $c+d={180}^{\circ }$
• D. $a+b+c={360}^{\circ }$

Answer 1

Answer: (A)

$a+b={180}^{\circ }$

Since, $AB\parallel EF$
$\therefore a+b={180}^{\circ }$ (Consecutive interior angles).