PSLE The perimeter of figure VWXYZ is (7
e + 17) cm. The perimeter of square VWXY is 16 cm.
- Find the perimeter of triangle VYZ in terms of e.
- The perimeter of figure VWXYZ is 66 cm. What is the value of e? Give your answer in cm.
(a)
Length of the square
= 16 ÷ 4
= 4 cm
Total lengths of VW, WX and XY
= 3 x 4
= 12 cm
Perimeter of triangle VYZ
= 7
e + 17 - 4 - 4
= (7
e + 9) cm
(b)
7
e + 17 = 66
7
e = 66 - 17
7
e = 49
e = 49 ÷ 7 = 7
Value of
e = 7 cm
Answer(s): (a) (7
e + 9) cm; (b) 7 cm