PSLE The perimeter of figure GHJKL is (7
p + 25) cm. The perimeter of square GHJK is 32 cm.
- Find the perimeter of triangle GKL in terms of p.
- The perimeter of figure GHJKL is 88 cm. What is the value of p? Give your answer in cm.
(a)
Length of the square
= 32 ÷ 4
= 8 cm
Total lengths of GH, HJ and JK
= 3 x 8
= 24 cm
Perimeter of triangle GKL
= 7
p + 25 - 8 - 8
= (7
p + 9) cm
(b)
7
p + 25 = 88
7
p = 88 - 25
7
p = 63
p = 63 ÷ 7 = 9
Value of
p = 9 cm
Answer(s): (a) (7
p + 9) cm; (b) 9 cm