PSLE The perimeter of figure LMNPQ is (6
h + 25) cm. The perimeter of square LMNP is 28 cm.
- Find the perimeter of triangle LPQ in terms of h.
- The perimeter of figure LMNPQ is 79 cm. What is the value of h? Give your answer in cm.
(a)
Length of the square
= 28 ÷ 4
= 7 cm
Total lengths of LM, MN and NP
= 3 x 7
= 21 cm
Perimeter of triangle LPQ
= 6
h + 25 - 7 - 7
= (6
h + 11) cm
(b)
6
h + 25 = 79
6
h = 79 - 25
6
h = 54
h = 54 ÷ 6 = 9
Value of
h = 9 cm
Answer(s): (a) (6
h + 11) cm; (b) 9 cm