PSLE The perimeter of figure UVWXY is (6
g + 24) cm. The perimeter of square UVWX is 8 cm.
- Find the perimeter of triangle UXY in terms of g.
- The perimeter of figure UVWXY is 42 cm. What is the value of g? 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
= 6
g + 24 - 2 - 2
= (6
g + 20) cm
(b)
6
g + 24 = 42
6
g = 42 - 24
6
g = 18
g = 18 ÷ 6 = 3
Value of
g = 3 cm
Answer(s): (a) (6
g + 20) cm; (b) 3 cm