Question from Unit 1 &2 Cambridge Methods Text, Chapter 2

[ThePinecone97]

I have correctly answered most of the question, but don't know how to approach parts e & f. Help please?

The answers for e and f respectively are 10 and 40 (square units).

[Phy124]

(e)

Area of a triangle = .

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You have a base length of 10 (the difference between y coordinates) and a height of 2 (the difference between x coordinates)

Hence A = units²

(f) Firstly work out the area of the right triangle:

Image

It has base length 10 and height 6 therefore units²

Therefore the the quadrilateral has an area of 10 + 30 = 40 units²