Chapter 3 CNC Math 57
Parallelogram
A parallelogram is a quadrilateral with equal opposite sides and equal
opposite angles. The diagonals bisect each other and create two pairs of
congruent triangles.
Circles
A circle is a set of points, located on a plane, that are equidistant from a
common central point (center point). See Figure 3-6. There are a number of
terms that are used to describe various aspects of a circle, Figure 3-7.
The diameter is the segment that connects two points on a circle
and intersects through the center of the circle. The size of a circle is its
diameter.
The radius is a segment that joins the circle center to a point on the
circle circumference. Radius has half the value of diameter.
Square Rectangle
Parallelogram
Figure 3-5. The three types of quadrilaterals. Quadrilaterals have four interior angles that total 360°.
H
Figure 3-6. All points defining a circle are equidistant from the center point.