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Triangles/ Coprime Integers

Can someone help me work this out?

The question is attached. I can work out angle BAC, but how do I go about working out a and b?

am I right in thinking that coprime means that both numbers are only divisible by 1?

And what level maths would you place this as? (GCSE,A-Level, etc) I'm curious because I haven't encountered a problem like this before.
maths problem 2.png9.2KB
Original post by ThatPerson
Can someone help me work this out?

The question is attached. I can work out angle BAC, but how do I go about working out a and b?

am I right in thinking that coprime means that both numbers are only divisible by 1?

And what level maths would you place this as? (GCSE,A-Level, etc) I'm curious because I haven't encountered a problem like this before.


Probably GCSE level.

Coprime means that the only factor they have in common is 1.

In this case it means that b/a is written in lowest possible terms of b and a.
Reply 2
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ThatPerson
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18
Original post by ghostwalker
Probably GCSE level.

Coprime means that the only factor they have in common is 1.

In this case it means that b/a is written in lowest possible terms of b and a.


Is the answer 9?
Reply 3
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TenOfThem
18
Original post by ThatPerson
Is the answer 9?


yes
As TenOfThem said.
Reply 5
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TenOfThem
18
Original post by ghostwalker
As TenOfThem said.


Only with a capital letter and a full stop :smile:
Original post by TenOfThem
Only with a capital letter and a full stop :smile:


Don't get me started. Your neglect of punctunation verges on being legendary. :tongue:

Oh dear, there I go

And no full stop!

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