If a regular polygon has 5 sides then the measure of its interior angle is greater than the measure of its exterior angle by how many degrees? 

Three circles of radius 3.5 cm each are placed in such a way that each touches the other two. The area of the portion enclosed by the circles is 

The perimeter of a rhombus is 100 cm, if one of its diagonals is 14 cm. Then the area of the rhombus is 

One of the four angles of a rhombus is 60°. If the length of each side of the rhombus is 8 cm, then the length of the longer diagonal is 

Two circle C1 and C2 touch each other internally at P. Two lines PCA and PDB meet the circles C1 in C, D and C2 in A, B respectively. If ∠BDC = 120^o, then the value of ∠ABP is equal to -

The sides of a rectangular plot are in the ratio 5: 4 and its area is equal to 500 sq.m. The perimeter of the plot is: 

If the area of a circle inscribed in a square is 9π , then the area of the square is

if one of the interior angles of a regular polygon is times of one of the interior angles of a regular decagon, then the number of diagonal of the polygon is.