Vocab 1
An educated guess written in conditional ("If..., then...") form.
conjecture
A conjecture that has been proven to be true.
theorem
A line segment drawn from the center of a circle to a point on the circle.
radius
A quadrilateral with two pairs of parallel sides.
Parallelogram
A line segment drawn through the center of a circle with both endpoints on the circle
Diameter
A quadrilateral with four right angles and four congruent sides.
square
A point that divides a segment into two segments of equal length.
midpoint
polygon with four sides.
Quadrilateral
fixed point from which all points on the circle are equidistant
A trapezoid with a pair of equal base angles (from the same base).
A quadrilateral with four right angles.
Rectangle
A quadrilateral with four congruent sides and opposite angles are equal
rhombus
Two lines that never intersect. The slope of the lines is equal.
Parallel
Any expression is always equal to itself. That is, a = a. This property is often useful when proving that two triangles that share a side or an angle are congruent.
Reflexive property
In a polygon, it is a segment that connects two vertices of the polygon but is not a side of the polygon.
Diagonal
A quadrilateral with at least one pair of parallel sides.
trapezoid
Polygon with congruent angles and congruent sides.
regular polygon
The set of all points on a flat surface that are the same distance from a fixed point
circle
Two rays, line segments, or lines that meet (intersect) to form a right angle (90º)
Perpendicular
The angles that occur at the two ends of any side of a polygon. For example, ∠B and ∠C are consecutive angles
consecutive angles of a polygon