Mathematics 4024 · O Level · Angles

Angles — practice question

In the diagram, $ABC$ and $DEF$ lie on parallel lines. $\angle ABE = 123^{\circ}$ and $\angle CEF = 40^{\circ}$.

(a)[1]

Calculate $\angle DEB$.

(b)[1]

Calculate $\angle BEC$.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The correct value is $57$.” …