How can we help?
You can also find more resources in our
Select a category
Something is confusing
Something is broken
I have a suggestion
What is your email?
What is 1 + 3?
a number of quantity that divides another number or quantity
a polygon with twelve sides
domain of a function
the set of numbers which are permissible replacement values for the independent variable of a function
element of a set
any one of the individual objects or members belonging to a set
the set that has no members
the property of two things being equal and symbolized by the equals sign
symbol of equality
an algebraic statement consisting of two algebraic expressions connected by an equals sign
a polygon whose angles all have equal measure
a triangle whose three angles all have equal measure