Area of a semi circle is ________ times the area of the circle.
two
four
one-half
one-quarter
Quadrant of a circle is __________ of the circle.
one - half
one - fourth
one - third
two - third
The number of quadrants in a circle is
1
2
3
4
Perimeter of a semicircle is ________
2r units
A polygon in which at least one angle is more than 180o is called a ___________
Concave polygon
Convex polygon
irregular polygon
None of these
Central angle of the quadrant is
0o
90o
180o
360o
Number of sides of a decagon is
7
8
9
10
A polygon in which each interior angle is less than 180o, is called __________ polygon.
Concave
Convex
irregular
If the radius of a circle is 7m, then the area of the semi circle is
77m2
44m2
88m2
154m2
