Final answer:
The space inside an object is called the volume. Objects that have volume include solids, liquids, and gases. Parallel lines have equal slopes, while perpendicular lines have slopes that are negative reciprocals of each other. A secant is a line that intersects a curve in two or more point.
Step-by-step explanation:
The space inside an object is called the volume. Objects that have volume include solids, liquids, and gases. Solids, like a book or a table, have a fixed volume. Liquids, like water or milk, also have a fixed volume but take the shape of the container they are in. Gases, like air or helium, do not have a fixed volume and can expand or compress to fill the container they are in.
Parallel lines have equal slopes, which means they have the same steepness. For example, if one line has a slope of 2, then any line parallel to it will also have a slope of 2. Perpendicular lines have slopes that are negative reciprocals of each other. For example, if one line has a slope of 2, a line perpendicular to it will have a slope of -1/2.
In geometry, a secant is a line that intersects a curve in two or more points. A tangent is a line that touches a curve at a single point and is perpendicular to the curve at that point. In other words, a secant cuts through a curve, while a tangent just grazes it.