Question
The figures are not drawn to scale. Figure 1 shows a rectangular piece of paper SUVX that measures 21 cm by 15 cm. ST = WV = 6 cm. The paper is folded along the dotted line TW such that point U touches point X, as shown in Figure 2.
  1. Find the area of Figure 2. STWVX, after the folding. 
  2. In Figure 2, ∠STX is 80°. Find ∠TWV in Figure 2.
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

The figures are not drawn to scale. Figure 1 shows a rectangular piece of paper SUVX that measures 21 cm by 15 cm. ST = WV = 6 cm. The paper is folded along the dotted line TW such that point U touches point X, as shown in Figure 2.
  1. Find the area of Figure 2. STWVX, after the folding. 
  2. In Figure 2, ∠STX is 80°. Find ∠TWV in Figure 2.