The Circle
The perimeter of a circle
Circumference
Definition of congruent figures
Same size and shape; or can be made to coincide
A general statement accepted without proof to be true
Axiom
All right angles are _?_
equal
An equilateral triangle is also equiangular
True
A line through the center of a circle with its ends on the circle
Diameter
If triangle ABC is congruent to triangle DEF, angle B is corresponding with angle _?_
E
A geometric assumption accepted without proof to be true
Postulate
The whole is _?_ any of its parts
greater than
The whole is equal to the sum of its parts
True
The relationship between the diameter and radius of a circle
The radius is half the diameter (or the diameter is twice the radius)
Two ways to prove any two triangles congruent
SAS and ASA
A statement not self-evident but proved by a chain of reasoning
Theorem
The sum of all the angles about a point on one side of a straight line through the point is _?_
A straight angle (or 180o)
The sum of all the angles about a point is equal to 180o
False (equal to 360o)
Any portion of a circle
Two ways to prove two right triangles congruent
LL and LA
A geometric statement easily deduced from a given theorem
Corollary
When two straight lines intersect, the _?_ angles formed are equal
Vertical
The sum of two sides of a triangle is less than the third side
False (greater than)
A chord is _?_ (always, sometimes, or never) a diameter
Sometimes
What does CPCTE stand for?
Corresponding parts of congruent triangles are equal
A statement of beginning facts about lines, angles, figures used in a proof
Given
Angles _?_ equal sides in a triangle are equal
Any straight line whose ends are on a circle is a diameter
False (a chord is not always a diameter)