y m a The perimeter of a square is 16 cm. Find the length of its diagonal, correct to 1 decimal place. b A rectangle's length is twice its breadth. Find the length of its diagonal (to 1 dec. pl.) if its perimeter is 90 cm.5 a The diagram shows a cone with a radius of 3-6 m and a slant height of 6 m. Calculate the height, h, of the cone. hm 6 m b Calculate x and y. c Find the values of d Find the value of h. 5 m h and L. 3-6 m 5 m Lm E 4 m hm 15 m 9.6 m 13 m am 2.4 m 7.68 m y m `ite diagonal, correct to