PSLE The perimeter of figure TUVWX is (10
y + 19) 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 79 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
= 10
y + 19 - 3 - 3
= (10
y + 13) cm
(b)
10
y + 19 = 79
10
y = 79 - 19
10
y = 60
y = 60 ÷ 10 = 6
Value of
y = 6 cm
Answer(s): (a) (10
y + 13) cm; (b) 6 cm