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Hello, SarahGr!
A triangle had area of 21 cm² and two of its sides are 9 cm and 14cm long.
Find the possible measures of the angle formed by these sides?
I know the formula for the area of a triangle is ½abSin(C)
but i have no idea how to do this one.
The formula is: .
We are given: .
Plug them in! . . .
Then: .