1. a.three-dimensional closed
surface such that every point on
the surface is equidistant from a
given point, the centre
b. the solid figure bounded by
this surface or the space
enclosed by it. Equation: (x–a)2 +
(y–b)2 + (z–c)2 = r2, where r is
the radius and (a, b, c) are the coordinates of the centre; surface area:
4πr2; volume: 4πr3/3
A cone is a solid that has a circular base
and a a single vertex. If the vertex is over
the center of the base, it is called a right
cone. If it is not, it is called an oblique cone.
An object that is shaped like a cone is said
to be 'conical'.
2. In geometry, a hexagon (from Greek ἕξ hex, "six"
and γωνία, gonía, "corner, angle") is a six-
sided polygon or 6-gon. The total of the internal
angles of any simple (non-self-intersecting)
hexagon is 720°and it's internal angle is 120°.
A math concept is the 'why' or 'big idea' of math.
Knowing a math concept means you know the
workings behind the answer.You know why you
got the answer you got and you don't have to
memorize answersor formulasto figure them
out. Because you know why things work, you can
figure out the answers and formulasyourself.
You understand answers and formulasbetter
and can tell when something isn't quite right.
When you understand a math concept, you have
essentially reached an upper tier in math that allows you to think and
process abstractly.
