12
15
10
14
Correct answer is D
each interior angle of a polygon = \(\frac{(n - 2)\times 180}{n}\) where n = no of side of a polygon
each exterior angle of a polygon = \(\frac{360}{n}\)
then \(\frac{(n - 2)\times 180}{n}\) = 6\(\times\) \(\frac{360}{n}\)
= (n - 2) 180 = 2160
= 180n - 360 = 2160
= 180n = 2160 + 360
= 180n = 2520
therefore, n = \(\frac{2520}{180}\) = 14.
If S = (x : x\(^2\) = 9, x > 4), then S is equal to...
The volume of a cube is 512cm3. Find the length of its side...
In the figure, TSP = 100° and PRQ = 20°. Find PQR. ...
In the diagram, POQ is the diameter of the circle centre O. Calculate ∠QRS ...
Find the sum of the first 18 terms of the series 3, 6, 9,..., 36. ...
Evaluate (1/2 - 1/4 + 1/8 - 1/16 + ...) - 1 ...
Evaluate \(1011_{two}\) + \(1101_{two}\) + \(1001_{two}\) - \(111_{two}\)...
In the diagram above, |PQ| = |QR|, |PS| = |RS|, ∠PSR = 30o and ∠PQR = 80o. Find ∠SPQ....