Mong Chang Hsi's answer to Sophia's Secondary 3 E Maths question.
For bi)
Angle FAC = Angle EAD (same angle)
Angle AFC = Angle AED (corresponding angle)
Angle ACF = Angle ADE (corresponding angle)
Angle FAC = Angle EAD (same angle)
Angle AFC = Angle AED (corresponding angle)
Angle ACF = Angle ADE (corresponding angle)
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