PSLE The perimeter of figure STUVW is (5
d + 16) cm. The perimeter of square STUV is 12 cm.
- Find the perimeter of triangle SVW in terms of d.
- The perimeter of figure STUVW is 61 cm. What is the value of d? Give your answer in cm.
(a)
Length of the square
= 12 ÷ 4
= 3 cm
Total lengths of ST, TU and UV
= 3 x 3
= 9 cm
Perimeter of triangle SVW
= 5
d + 16 - 3 - 3
= (5
d + 10) cm
(b)
5
d + 16 = 61
5
d = 61 - 16
5
d = 45
d = 45 ÷ 5 = 9
Value of
d = 9 cm
Answer(s): (a) (5
d + 10) cm; (b) 9 cm