What is a point?

A location represented by a dot. Named by a capital letter.

What is a line?

A straight, continuous arrangement of infinitely many points. Named by 2 points on the line or by a small letter.

What is a Plane?

A flat surface that extends infinitely long and wide. Named with a cursive letter.

What is a collinear plane?

Where 3 or more points are on the same line.

What are Coplanar points?

3 or more points on the same plane.

What is a line segment?

2 points, and all the continuous points between them that are collinear with the two points.

What is a congruent segment?

2 segments that are the same in measure or length

What is the midpoint of a segment?

Point on the segment that's the same distance from both endpoints.

Bisect?

To divide into two congruent parts. The midpoint bisects two points.

Ray

An endpoint and all collinear points on one side of that endpoint.

Midpoint formula.

M= (x₁+x₂)/2 (Y₁+Y₂) /2

Don't forget to add the three-dot triangle before your points.

What is an angle?

2 non collinear rays called sides having a common endpoint called a vertex.

Congruent angles?

2 or more angles with the same degree measure.

What is an angle bisector

A ray from the vertex of an angle that divides the angle into 2 equal angles.t

What are skew lines.?

Non-Coplanar lines that never intersect.

Drawling... Two lines on different planes.

Perpendicular lines?

Lines that intersect at 90 degrees angle.

Vertical angles?

2 angles that are opposite each other when 2 lines inter sect. The two opposite angles are the same measure.

Looks like in "x''

Linear pair of angles?

2 angles that share a common vertex and side, while their other two sides form a straight line.

Complementary angle?

A pair of angles that add to measure 90 degrees.

Supplementary angles?

A pair of angles that add up to measure 180 degrees.