PSLE The perimeter of figure STUVW is (9
g + 20) cm. The perimeter of square STUV is 8 cm.
- Find the perimeter of triangle SVW in terms of g.
- The perimeter of figure STUVW is 101 cm. What is the value of g? Give your answer in cm.
(a)
Length of the square
= 8 ÷ 4
= 2 cm
Total lengths of ST, TU and UV
= 3 x 2
= 6 cm
Perimeter of triangle SVW
= 9
g + 20 - 2 - 2
= (9
g + 16) cm
(b)
9
g + 20 = 101
9
g = 101 - 20
9
g = 81
g = 81 ÷ 9 = 9
Value of
g = 9 cm
Answer(s): (a) (9
g + 16) cm; (b) 9 cm