Since, a pentagon has five sides, i.e. n = 5
Hence, the number of diagonals = 5(5−3)2=5
The diagonals of pentagon are AC, AD, BE, BD and CE.
Question 78
Draw all the diagonals of a pentagon ABCDE and name them.
Draw a pentagon and draw a hexagon. Draw all the diagonals for both these figures. Which figure has more diagonals?