Other Formulae Flashcards
1
Q
How do you find the sum of angles in a polygon?
A
(Number of sides - 2) x 180
2
Q
What do we say when there is a question that we have to use the sine rule for?
A
‘It’s all about the opposites’ - 2 pairs of opposite sides and angles, one of them we’re trying to work out.
3
Q
What is it where we have to use the cosine rule?
A
2 sides, and an included angle.
4
Q
What is the sine rule?
A
5
Q
What is the cosine rule?
A
a2 = b2 + c2 - 2bc cosA
6
Q
In histograms, how do you work out frequency densityy?
A
Frequency density = frequency / class width
7
Q
A
