PSLE The perimeter of figure UVWXY is (10
p + 22) cm. The perimeter of square UVWX is 8 cm.
- Find the perimeter of triangle UXY in terms of p.
- The perimeter of figure UVWXY is 92 cm. What is the value of p? Give your answer in cm.
(a)
Length of the square
= 8 ÷ 4
= 2 cm
Total lengths of UV, VW and WX
= 3 x 2
= 6 cm
Perimeter of triangle UXY
= 10
p + 22 - 2 - 2
= (10
p + 18) cm
(b)
10
p + 22 = 92
10
p = 92 - 22
10
p = 70
p = 70 ÷ 10 = 7
Value of
p = 7 cm
Answer(s): (a) (10
p + 18) cm; (b) 7 cm