PSLE The perimeter of figure KLMNP is (9
v + 15) cm. The perimeter of square KLMN is 12 cm.
- Find the perimeter of triangle KNP in terms of v.
- The perimeter of figure KLMNP is 69 cm. What is the value of v? 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
= 9
v + 15 - 3 - 3
= (9
v + 9) cm
(b)
9
v + 15 = 69
9
v = 69 - 15
9
v = 54
v = 54 ÷ 9 = 6
Value of
v = 6 cm
Answer(s): (a) (9
v + 9) cm; (b) 6 cm