PSLE The perimeter of figure TUVWX is (7
y + 17) 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 66 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
= 7
y + 17 - 3 - 3
= (7
y + 11) cm
(b)
7
y + 17 = 66
7
y = 66 - 17
7
y = 49
y = 49 ÷ 7 = 7
Value of
y = 7 cm
Answer(s): (a) (7
y + 11) cm; (b) 7 cm