maths (⊙﹏⊙) Flashcards
1
Q
4 sides
A
quadrilateral
2
Q
5 sides
A
pentagon
3
Q
6 sides
A
hexagon
4
Q
7 sides
A
heptagon
5
Q
8 sides
A
octagon
6
Q
9 sides
A
nonagon
7
Q
10 sides
A
decagon
8
Q
whats the formula for diagonals
A
n(n-3)
______
2
9
Q
commutative law
A
a + b = b + a
a x b = b x a
10
Q
associative law
A
(a + b) + c = a + (b + c)
(a × b) × c = a × (b × c)
11
Q
distributive law
A
a × (b + c) = a × b + a × c
a × (b – c) = a × b – a × c
12
Q
identity law
A
a + 0 = a
a × 0 = 0
a × 1 = a
a + (– a) = 0
a × 1/a = 1
