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# Need help with maths question watch

1. Theres the question im struggling with^^
2. formula for area of triangle is 1/2 absinC
since BC is double AB let AB=2x and BC=x
substitute from there. do note you already have the area so you'll have to re arrange.

I would do it myself but it's better to help and not to just do. Do post your answer though and ill compare it with mine
3. (Original post by Toasticide)
formula for area of triangle is 1/2 absinC
since BC is double AB let AB=2x and BC=x
substitute from there. do note you already have the area so you'll have to re arrange.

I would do it myself but it's better to help and not to just do. Do post your answer though and ill compare it with mine
Thanks a lot for explaining it to me!, I knew the answer(from the markscheme), but I didn't understand how to work it out. I didn't realize that the length AB and BC could be substituted as ab in the formula, otherwise it would of been easier.

The correct answer 4 root 5

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