PSLE The perimeter of figure TUVWX is (7
e + 25) cm. The perimeter of square TUVW is 12 cm.
- Find the perimeter of triangle TWX in terms of e.
- The perimeter of figure TUVWX is 60 cm. What is the value of e? 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
e + 25 - 3 - 3
= (7
e + 19) cm
(b)
7
e + 25 = 60
7
e = 60 - 25
7
e = 35
e = 35 ÷ 7 = 5
Value of
e = 5 cm
Answer(s): (a) (7
e + 19) cm; (b) 5 cm