Please help me..coordinate geometry?

Question

Hello, I have attached the question with my working on here:

https://imgur.com/a/WAE8vFl

I need help for (c) only, I can do part (d). I have done (a) and (b) since you need those information to solve (c), you can see the second picture.

Here is the graph: https://www.desmos.com/calculator/sfid3lilul

Thanks in advance

Answer 1

Favorite Answer

https://imgur.com/pzuUVeV

Answer 2

Area of the trapezium is |OA|(|OC|+|AB|)/2.

This is the perpendicular height × the average of the lengths of the parallel sides.

As you have already shown yourself capable of the other parts of the question, I will call that the "help" you asked for, and not insult you by performing the calculations.