rather big numbers (use a calculator)

the intention, advocated by Ed Southall (solve my maths), is for students to decide which dimensions they need in order to work out the area of a triangle

then they can be asked to calculate it another way

(and possibly a third way)

the areas are:

(1) 150

(2) 5,070

(3) 302,580

(4) 1,227,930

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