The figure is an isosceles triangle. The base angle on the right is $43^\circ$. The two congruent sides are indicated. The angle at the apex is marked $x^\circ$. NOT TO SCALE.
(main)[2]
Determine the value of $x$.
Worked solution & mark scheme
This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “An equation equal to $x+2\times43=180$ is formed, or an equivalent one” …