Halfclosed
interval
Including only
one endpoint but not the other; of the form [a,b) or (a,b] or equivalently
.
Linear inequalities
System of inequalities
Heron's
Formula
A formula for
the area of a triangle ,
where a, b, c are side of the triangle and .
For example, if the sides of a triangle are 7, 5, 4 then
.
Height
The length from
the vertex to the opposite base, or the length between two parallel
sides or parallel face for a polygon or solid. For example,
in the following triangle, the height is drawn.
Hexagon
A plane figure
with six sides.
Hypotenuse
For a right
triangle, the side opposites the right angle is called the hypotenuse.
For any right triangle, the Pythagorean theorem asserts that:
(leg 1)^{2} + (leg 2)^{2} = (hypotenuse)^{2
}
