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Trigonometry maths help?!

My brain seems to be dead today. Please help - I just don't know where to start with this question. Thank you!

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the sides you know are the equal ones

just use area=1/2absinC
Reply 3
There is a formula for the area of a triangle:

Area = 1/2*ab*sinC

Where a and b are two sides and angle C is the included angle. (The angle between the sides a and b)

Can you see that you have been given the Area, and a and b? Subsitute them into the formula.
Original post by Arithmeticae
the sides you know are the equal ones

just use area=1/2absinC


Original post by Thorsas
There is a formula for the area of a triangle:

Area = 1/2*ab*sinC

Where a and b are two sides and angle C is the included angle. (The angle between the sides a and b)

Can you see that you have been given the Area, and a and b? Subsitute them into the formula.


Omg I feel like such an idiot ><

Thank you both! :smile:

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