PSLE The perimeter of figure TUVWX is (5
y + 14) cm. The perimeter of square TUVW is 12 cm.
- Find the perimeter of triangle TWX in terms of y.
- The perimeter of figure TUVWX is 59 cm. What is the value of y? Give your answer in cm.
(a)
Length of the square
= 12 ÷ 4
= 3 cm
Total lengths of TU, UV and VW
= 3 x 3
= 9 cm
Perimeter of triangle TWX
= 5
y + 14 - 3 - 3
= (5
y + 8) cm
(b)
5
y + 14 = 59
5
y = 59 - 14
5
y = 45
y = 45 ÷ 5 = 9
Value of
y = 9 cm
Answer(s): (a) (5
y + 8) cm; (b) 9 cm