Board Thread:Roleplay/@comment-29969851-20181227165847/@comment-3991308-20181227184540

Klara took a look at the book. "Right," she said. "Or rather, not right - you're looking for the cosine of this angle of a scalene triangle."

She pointed to a little theta symbol.

"You're given the length of the sides, so let's think about this in terms of what you do know."

And she explained: how the cosine of an angle of a right angled triangle could be found by dividing the length of the adjacent side by the hypotenuse.

"So if we split this triangle into two right angled triangles like so..." she said, drawing a perpendicular line down.