Question

Referring to the given figure, for what value of $(x^o+y^o)$ will $ABC$ be a line?

• A. ${90}^{\circ }$
• B. ${180}^{\circ }$
• C. ${45}^{\circ }$
• D. ${100}^{\circ }$

Answer 1

Answer: (B)

${180}^{\circ }$

For $ABC$ to be in a straight line, the sum of adjacent angles must be ${180}^{\circ }$
Hence, $x^{\circ }+y^{\circ }={180}^{\circ }$

Option B.