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Determine the value of x.
Mathematics 0580 · IGCSE · Angles
Angles — practice question
ABC forms a straight line, and ABD is an isosceles triangle. The exterior angle at B measures 140^{\circ}, while the angle at D is x^{\circ}.
Worked solution & mark scheme
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Equivalent expression: $180-(180-140)\times2$ or equivalent” …
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