Question

The sum of all interior angles of a 8 sided polygon is ________.

• A.
  ${180}^{\circ }$
• B. ${1080}^{\circ }$
• C. ${540}^{\circ }$
• D. ${720}^{\circ }$

Answer 1

The correct option is B ${1080}^{\circ }$

If a polygon has n sides, the sum of all angles is given by $(n-2)\times {180}^{\circ }$.


Here, polygon has 8 sides. Sum of all interior angles of 8 sided polygon
$=(8-2)\times {180}^{\circ }=6\times {180}^{\circ }={1080}^{\circ }$