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Abcd and efg are parallel lines. BC=CF. Angle BFE=70°. work out the size of angle x with reasons
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Abcd and efg are parallel lines. BC=CF. Angle BFE=70°. work out the size of angle x with reasons

Abcd and efg are parallel lines. BC=CF. Angle BFE=70°. work out the size of angle-example-1
User Amy M
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CBF = BFE (interior angles)
CBF = CFB = 70° (isosceles triangle, BC = BF)
CBF + CFB + BCF = 180° (summation of all angles in a triangle always equals 180°)
so we have : 70° + 70° + x = 180°
so x= 40°
User Sekitaka
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