PSLE The perimeter of figure UVWXY is (4
v + 25) cm. The perimeter of square UVWX is 12 cm.
- Find the perimeter of triangle UXY in terms of v.
- The perimeter of figure UVWXY is 41 cm. What is the value of v? 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
= 4
v + 25 - 3 - 3
= (4
v + 19) cm
(b)
4
v + 25 = 41
4
v = 41 - 25
4
v = 16
v = 16 ÷ 4 = 4
Value of
v = 4 cm
Answer(s): (a) (4
v + 19) cm; (b) 4 cm