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Answer:
The angle formed between 2 secants = ½(major arc + minor arc)
6. ∠1 = ½(WR + XS)
∠2 = ½(WX + RS)
Note: Add a symbol, ⌒ for arcs WR, XS, WX and RS.
7. ∠1 = ½(WR + XS)
∠1 = ½(110 + 130)
∠1 = ½(240)
∠1 = 120⁰
8.) ∠2 = ½(WX + RS)
∠2 = ½(70 + 60)
∠2 = ½(130)
∠2 = 65⁰
9.) ∠2 = ½(WX + RS)
2∠2 = WX + RS
RS = 2∠2 - WX