Mathematics 4024 · O Level · Length and midpoint

Length and midpoint — practice question

$A$ is located at $(8, 7)$, $B$ at $(-2, 11)$, and $C$ at $(1, 7)$.

(a)[2]

Calculate the area of triangle $ABC$.

(b)[2]

Calculate the length of $AB$.

(c)[2]

Calculate the total perimeter of triangle $ABC$.

(d)[2]

Calculate the value of $\angle BAC$.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “This is $\frac12\times7\times4$.” …