Flashcard: Fundamentals of Geometric Concepts and Properties — 16 carte

Point — definition?

A precise location with no size.

Line — role?

Extends infinitely in both directions.

Plane — function?

A flat surface extending infinitely.

Ray — description?

Starts at a point and extends infinitely in one direction.

Line segment — meaning?

Part of a line between two endpoints.

Angle — formed by?

Two rays sharing a vertex.

Acute angle — measure?

Less than 90°.

Right angle — measure?

Exactly 90°.

Obtuse angle — measure?

More than 90°, less than 180°.

Straight angle — measure?

Exactly 180°.

Complementary angles — sum?

Add up to 90°.

Supplementary angles — sum?

Add up to 180°.

Vertical angles — property?

Always equal when two lines intersect.

Parallel lines — create?

Corresponding, alternate interior, and consecutive interior angles.

Triangle types — examples?

Equilateral, isosceles, scalene.

Triangle inequality — states?

Sum of two sides > third side.