PSLE The perimeter of figure VWXYZ is (4
b + 20) cm. The perimeter of square VWXY is 8 cm.
- Find the perimeter of triangle VYZ in terms of b.
- The perimeter of figure VWXYZ is 52 cm. What is the value of b? 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
= 4
b + 20 - 2 - 2
= (4
b + 16) cm
(b)
4
b + 20 = 52
4
b = 52 - 20
4
b = 32
b = 32 ÷ 4 = 8
Value of
b = 8 cm
Answer(s): (a) (4
b + 16) cm; (b) 8 cm