PSLE The perimeter of figure NPQRS is (4
h + 22) cm. The perimeter of square NPQR is 12 cm.
- Find the perimeter of triangle NRS in terms of h.
- The perimeter of figure NPQRS is 58 cm. What is the value of h? Give your answer in cm.
(a)
Length of the square
= 12 ÷ 4
= 3 cm
Total lengths of NP, PQ and QR
= 3 x 3
= 9 cm
Perimeter of triangle NRS
= 4
h + 22 - 3 - 3
= (4
h + 16) cm
(b)
4
h + 22 = 58
4
h = 58 - 22
4
h = 36
h = 36 ÷ 4 = 9
Value of
h = 9 cm
Answer(s): (a) (4
h + 16) cm; (b) 9 cm