PSLE The perimeter of figure KLMNP is (6
x + 15) cm. The perimeter of square KLMN is 24 cm.
- Find the perimeter of triangle KNP in terms of x.
- The perimeter of figure KLMNP is 63 cm. What is the value of x? 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
= 6
x + 15 - 6 - 6
= (6
x + 3) cm
(b)
6
x + 15 = 63
6
x = 63 - 15
6
x = 48
x = 48 ÷ 6 = 8
Value of
x = 8 cm
Answer(s): (a) (6
x + 3) cm; (b) 8 cm