In a rhombus ______ sides are equal.
1
2
3
4
Number of diagonals of a quadrilateral is.
Sum of exterior angles of a heptagon is.
180o
270o
360o
540o
A decagon has ____ diagonals.
12
20
35
38
In a polygon, if the line joining any two points lies inside the polygon, then the polygon is a
Convex polygon
Concave polygon
Irregular polygon
None of these
Sum of angles of a decagon is.
1440o
1420o
1260o
1280o
A regular quadrilateral is known as
Parallelogram
Rectangle
Trapezium
Square
A regular triangle is known as
Isosceles triagle
Equilateral triangle
Scalene triangle
In a polygon, if these exist even one line, which when joining two points of a polygon, does not lie inside the polygon completely, then that polygon is a