Carcass wrote:
Attachment:
#Grepracticequestion The figure above shows a regular 9-sides polygon.jpg
The figure above shows a regular 9-sides polygon. What is the value of X ?
Insert the valueUseful rule:
the sum of the angles in an n-sided polygon = (n - 2)(180°)So, the sum of the angles in an 9-sided polygon = (9 - 2)(180°) =
1260°Since we have a REGULAR 9-sides polygon, each interior angle is EQUAL
1260°/9 = 140°
So, each interior angle is
140°We get:
Since one of the
140° lies on the same line as angle x we know that the two angles add to 180°
We get" x° +
140° = 180°
Solve: x = 40°
Answer: 40
Cheers,
Brent
_________________
Brent Hanneson - founder of Greenlight Test Prep