PSLE The perimeter of figure KLMNP is (10
q + 19) cm. The perimeter of square KLMN is 8 cm.
- Find the perimeter of triangle KNP in terms of q.
- The perimeter of figure KLMNP is 49 cm. What is the value of q? Give your answer in cm.
(a)
Length of the square
= 8 ÷ 4
= 2 cm
Total lengths of KL, LM and MN
= 3 x 2
= 6 cm
Perimeter of triangle KNP
= 10
q + 19 - 2 - 2
= (10
q + 15) cm
(b)
10
q + 19 = 49
10
q = 49 - 19
10
q = 30
q = 30 ÷ 10 = 3
Value of
q = 3 cm
Answer(s): (a) (10
q + 15) cm; (b) 3 cm