PSLE The perimeter of figure STUVW is (10
y + 18) cm. The perimeter of square STUV is 8 cm.
- Find the perimeter of triangle SVW in terms of y.
- The perimeter of figure STUVW is 58 cm. What is the value of y? 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
= 10
y + 18 - 2 - 2
= (10
y + 14) cm
(b)
10
y + 18 = 58
10
y = 58 - 18
10
y = 40
y = 40 ÷ 10 = 4
Value of
y = 4 cm
Answer(s): (a) (10
y + 14) cm; (b) 4 cm