PSLE The perimeter of figure GHJKL is (4
p + 17) cm. The perimeter of square GHJK is 20 cm.
- Find the perimeter of triangle GKL in terms of p.
- The perimeter of figure GHJKL is 41 cm. What is the value of p? Give your answer in cm.
(a)
Length of the square
= 20 ÷ 4
= 5 cm
Total lengths of GH, HJ and JK
= 3 x 5
= 15 cm
Perimeter of triangle GKL
= 4
p + 17 - 5 - 5
= (4
p + 7) cm
(b)
4
p + 17 = 41
4
p = 41 - 17
4
p = 24
p = 24 ÷ 4 = 6
Value of
p = 6 cm
Answer(s): (a) (4
p + 7) cm; (b) 6 cm