PSLE The perimeter of figure VWXYZ is (6
e + 12) cm. The perimeter of square VWXY is 20 cm.
- Find the perimeter of triangle VYZ in terms of e.
- The perimeter of figure VWXYZ is 60 cm. What is the value of e? Give your answer in cm.
(a)
Length of the square
= 20 ÷ 4
= 5 cm
Total lengths of VW, WX and XY
= 3 x 5
= 15 cm
Perimeter of triangle VYZ
= 6
e + 12 - 5 - 5
= (6
e + 2) cm
(b)
6
e + 12 = 60
6
e = 60 - 12
6
e = 48
e = 48 ÷ 6 = 8
Value of
e = 8 cm
Answer(s): (a) (6
e + 2) cm; (b) 8 cm