Could someone please give me hints 4 the questions circled in the attachment? I have no clue how to start to arrive at those answers.
Thanx a lot.
So (= total length of wire)
2(a) Draw vertical lines through the top vertices of the trapezium to the base. Then using the right-angled triangles thus formed, the width of the channel across the top is , and the depth of the channel .
Then use the formula:
Area of a trapezium = (sum of parallel sides) (perpendicular distance between them)