PSLE The perimeter of figure UVWXY is (8
y + 25) cm. The perimeter of square UVWX is 12 cm.
- Find the perimeter of triangle UXY in terms of y.
- The perimeter of figure UVWXY is 57 cm. What is the value of y? Give your answer in cm.
(a)
Length of the square
= 12 ÷ 4
= 3 cm
Total lengths of UV, VW and WX
= 3 x 3
= 9 cm
Perimeter of triangle UXY
= 8
y + 25 - 3 - 3
= (8
y + 19) cm
(b)
8
y + 25 = 57
8
y = 57 - 25
8
y = 32
y = 32 ÷ 8 = 4
Value of
y = 4 cm
Answer(s): (a) (8
y + 19) cm; (b) 4 cm