PSLE The perimeter of figure STUVW is (10
h + 20) cm. The perimeter of square STUV is 16 cm.
- Find the perimeter of triangle SVW in terms of h.
- The perimeter of figure STUVW is 80 cm. What is the value of h? Give your answer in cm.
(a)
Length of the square
= 16 ÷ 4
= 4 cm
Total lengths of ST, TU and UV
= 3 x 4
= 12 cm
Perimeter of triangle SVW
= 10
h + 20 - 4 - 4
= (10
h + 12) cm
(b)
10
h + 20 = 80
10
h = 80 - 20
10
h = 60
h = 60 ÷ 10 = 6
Value of
h = 6 cm
Answer(s): (a) (10
h + 12) cm; (b) 6 cm