Question

Middle school level ! Plane Geometry
The diagram shows the trapezium ABDC. AB is parallel to CD. AD and BC intersect at P. AB - 12cm and CD = 18cm.

a) Prove triangle ABP III triangle DCP
b) Given that AD = 15cm. Find the length of Ap

(diagram drawn below!)

Answer 1

you should look in your notes about angles formed by two parallel lines and a transversal
that is how you show angles in the two triangles are congruent.
you also should look up "vertical angle" to show the angles at P are congruent.