As of the method using the area of triangle, you have marked the lengths and area on the diagram very clearly. However, you have not written down how you could use areas of various parts in the diagram to find the answer. Pls add the line of working in this same post.

Mervin,

ReplyDeleteThe FOIL method working is correct :)

As of the method using the area of triangle, you have marked the lengths and area on the diagram very clearly. However, you have not written down how you could use areas of various parts in the diagram to find the answer.

Pls add the line of working in this same post.