PSLE The perimeter of figure KLMNP is (4
j + 17) cm. The perimeter of square KLMN is 16 cm.
- Find the perimeter of triangle KNP in terms of j.
- The perimeter of figure KLMNP is 49 cm. What is the value of j? Give your answer in cm.
(a)
Length of the square
= 16 ÷ 4
= 4 cm
Total lengths of KL, LM and MN
= 3 x 4
= 12 cm
Perimeter of triangle KNP
= 4
j + 17 - 4 - 4
= (4
j + 9) cm
(b)
4
j + 17 = 49
4
j = 49 - 17
4
j = 32
j = 32 ÷ 4 = 8
Value of
j = 8 cm
Answer(s): (a) (4
j + 9) cm; (b) 8 cm