PSLE The perimeter of figure HJKLM is (6
h + 18) cm. The perimeter of square HJKL is 24 cm.
- Find the perimeter of triangle HLM in terms of h.
- The perimeter of figure HJKLM is 60 cm. What is the value of h? Give your answer in cm.
(a)
Length of the square
= 24 ÷ 4
= 6 cm
Total lengths of HJ, JK and KL
= 3 x 6
= 18 cm
Perimeter of triangle HLM
= 6
h + 18 - 6 - 6
= (6
h + 6) cm
(b)
6
h + 18 = 60
6
h = 60 - 18
6
h = 42
h = 42 ÷ 6 = 7
Value of
h = 7 cm
Answer(s): (a) (6
h + 6) cm; (b) 7 cm