Mathematics 4024 · O Level · Area and perimeter

Area and perimeter — practice question

ABCD is a quadrilateral in which BC is parallel to AD. CD is perpendicular to BC. BC = 5 cm and AD = 12 cm. The area of triangle BCD is 20 cm$^2$.

(a)[1]

Find the value of $CD$.

(b)[1]

Find the area of triangle $ABD$

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The correct answer is $8$.” …