PSLE The perimeter of figure KLMNP is (4
d + 17) cm. The perimeter of square KLMN is 24 cm.
- Find the perimeter of triangle KNP in terms of d.
- The perimeter of figure KLMNP is 45 cm. What is the value of d? Give your answer in cm.
(a)
Length of the square
= 24 ÷ 4
= 6 cm
Total lengths of KL, LM and MN
= 3 x 6
= 18 cm
Perimeter of triangle KNP
= 4
d + 17 - 6 - 6
= (4
d + 5) cm
(b)
4
d + 17 = 45
4
d = 45 - 17
4
d = 28
d = 28 ÷ 4 = 7
Value of
d = 7 cm
Answer(s): (a) (4
d + 5) cm; (b) 7 cm