Lines, Line Segments, and Rays
Misc
Polygons
Geometry Vocabulary
Postulates and Theorems
100

A straight one-dimensional figure that extends infinitely in both directions, consisting of an infinite number of points.

What is a line?

100

These lines are the same distance apart ALWAYS.

What are parallel lines?

100

A polygon with four sides, four vertices, and four angles. The sum of its interior angles is always 360∘

What is a quadrilateral?

100
A 2 dimensional figure with three or more sides that is closed.
What is a polygon?
100

This theorem states that "Vertical Angles are congruent'

Vertical Angles Theorem

200
This looks like a line, but has a beginning and end.
What is a line segment?
200

These lines will cross.

What are intersecting lines?

200

A parallelogram with four right angles.

What is a rectangle?

200
A quadrilateral with two pairs of opposite and parallel sides.
What is a parallelogram?
200

"Through any two points, there is exactly one ____."

"Line"

300
This has a starting point, but goes on and on in one direction.
What is a ray?
300

A shape that has 6 sides.

What is a hexagon?

300

A rectangle with all four sides of equal length.

What is a square?

300
The corner, or point at which line segments meet in a polygon.
What is a vertex?
300

What are the five primary triangle postulates used to prove triangle congruence?

Side-Side-Side (SSS), Side-Angle-Side (SAS), Angle-Side-Angle (ASA), Angle-Angle-Side (AAS), and Right Angle-Hypotenuse-Side (RHS) or sometimes called Hypotenuse-Leg (HL)

400

A figure formed by two rays (called the sides) sharing a common endpoint (called the vertex).

What is a ray?

400

All angles in every triangle will add up to this number of degrees

180 degrees

400

A parallelogram with all sides equal in length. Opposite angles are congruent.

What is a rhombus?

400

A statement in the form "if p, then q." True unless p is true and q is false.

Example: "If it rains, then the grass will grow."

Conditional Statement (p→q)

400

What is this postulate: If AB = CD and CD = EF, then AB = EF.

Transitive Property

500

A location in space that has no size, dimension, or area; it is represented by a dot and named using a capital letter.

What is a point?

500

A quadrilateral has 3 angles measuring 90 degrees, 100 degrees, and 70 degrees. What is the measure of the 4th angle?

100 degrees

500

A quadrilateral with at least one pair of parallel sides.

What is a trapezoid?

500

What is this law in logic: If p→q and q→r, then p→r.

Example: If it rains, then the grass grows. If the grass grows, then the cows eat. Therefore, if it rains, the cows eat.

Law of Syllogism

500

Finish the Linear Pair Postulate: "If two angles form a linear pair, then they are ________."

"supplementary"

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