PSLE The perimeter of figure VWXYZ is (10
d + 13) cm. The perimeter of square VWXY is 8 cm.
- Find the perimeter of triangle VYZ in terms of d.
- The perimeter of figure VWXYZ is 103 cm. What is the value of d? Give your answer in cm.
(a)
Length of the square
= 8 ÷ 4
= 2 cm
Total lengths of VW, WX and XY
= 3 x 2
= 6 cm
Perimeter of triangle VYZ
= 10
d + 13 - 2 - 2
= (10
d + 9) cm
(b)
10
d + 13 = 103
10
d = 103 - 13
10
d = 90
d = 90 ÷ 10 = 9
Value of
d = 9 cm
Answer(s): (a) (10
d + 9) cm; (b) 9 cm