After rotating by `60^o` about a centre, a figure looks exactly the same as its original possition. At what other angles will this happen for the figure?

Investigate In the given figure, the angle measures 30⁰. Look at the same figure through a magnifying glass. Does the angle becomes larger? Does the size of the angle change?

Shazli took a wire of length 44cm and bent it into she shape of a circle. Find the radius of that circle. Also find its area. If the same wire is bent into the shape of a square, what will be the length of each of its sides? Which figure encloses more area, the circle or the square? (Take pi=22/7)

A TV tower stands vertically on a bank of a canal. From a point on the other bank directly opposite the tower, the angle of elevation of the top of the tower is 60^(@) . From another point 20 m away from this point on the line joining this point to the foot of the tower, the angle of elevation of the top of the tower is 30^(@) (see figure below). find the height of the tower and the width of the canal. .