R is a convex polygon. Does R have at least 8 sides?

(1) Exactly 3 of the interior angles of R are greater than 80 degrees.

(2) None of the interior angles of R are less than 60 degrees.

What is convex polygon

A convex polygon is a simple polygon whose interior is a convex set. The following properties of a simple polygon are all equivalent to convexity:

* Every internal angle is at most 180 degrees.

* Every line segment between two vertices of the polygon does not go

exterior to the polygon

To have minimun 8 sides a polygon should have sum of angles 180(n-2)

180(8-2) = 1080

(1). Exactly 3 of the interior angles of R are greater than 80 degrees.

Lets take the greatest value for these angles- 180 and smallest for other 5 -80.

180*3+80*5= 940 < 1080 ..SUFFI

(2) None of the interior angles of R are less than 60 degrees.

Angles can have any value ..NOT SUFFI

Answer A

i hope