Question
PSLE
Figure 1 shows a triangular card DEF with DF = FE. A number of such cards were arranged along the four sides of a rectangular board. Figure 2 shows part of the arrangement. A total of 28 pins were placed at an equal distance of 52 cm apart to hold the cards.
  1. Find the length of GH.
  2. Find the total area of the cards used.
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

PSLE
Figure 1 shows a triangular card DEF with DF = FE. A number of such cards were arranged along the four sides of a rectangular board. Figure 2 shows part of the arrangement. A total of 28 pins were placed at an equal distance of 52 cm apart to hold the cards.
  1. Find the length of GH.
  2. Find the total area of the cards used.