PSLE The perimeter of figure KLMNP is (5
g + 24) cm. The perimeter of square KLMN is 12 cm.
- Find the perimeter of triangle KNP in terms of g.
- The perimeter of figure KLMNP is 64 cm. What is the value of g? Give your answer in cm.
(a)
Length of the square
= 12 ÷ 4
= 3 cm
Total lengths of KL, LM and MN
= 3 x 3
= 9 cm
Perimeter of triangle KNP
= 5
g + 24 - 3 - 3
= (5
g + 18) cm
(b)
5
g + 24 = 64
5
g = 64 - 24
5
g = 40
g = 40 ÷ 5 = 8
Value of
g = 8 cm
Answer(s): (a) (5
g + 18) cm; (b) 8 cm