top of page

256

terms • Algebra 1 & Geometry

Math Vocabulary

Every term, the visual way. Each word comes with examples, a non-example, and often a short video—so students meet a concept by seeing it, not memorizing it. Find a term, project it, and let the noticing begin.

Visual examples

Many have videos

Filter by grade & unit

A 5-minute routine

Introduce Any Term

Don’t lead with the definition—lead with the visual. Show the examples and non-example before the meaning, and let students build the word themselves.

1

Show, don’t define

Project the term with its examples and non-example. Hide the definition.

2

Notice & wonder

Ask: what do you notice? What makes the examples different from the non-example?

3

Describe it

Students try to put the meaning into their own words—then discuss as a class.

4

Reveal the definition

Now show the real definition. Play the video to lock it in.

Term

Parabola

Video

Example

Example

Non-Example

The Reveal

A parabola is the U-shaped curve that graphs a quadratic function.

Showing 12 of 256 terms

Roster Notation

A way to represent a set by listing its elements inside braces.

Algebra 1

Open term →

Rotation

A turn of a figure around a fixed center point.

Geometry

Open term →

Rotational Symmetry

A figure has rotational symmetry if it matches itself after a rotation of less than 360°.

Geometry

Open term →

Same-Side Exterior Angles

Angles outside two lines and on the same side of a transversal.

Geometry

Open term →

Same-Side Interior Angles (Consecutive Angles)

Interior angles on the same side of a transversal.

Geometry

Open term →

Same-Side Interior Angles Converse

If same-side interior angles are supplementary, the two lines are parallel.

Geometry

Open term →

Same-Side Interior Angles Theorem

If parallel lines are cut by a transversal, same-side interior angles are supplementary.

Geometry

Open term →

Scale Factor

The ratio that tells how much a figure is enlarged or reduced.

Geometry

Open term →

Segment

Part of a line with two endpoints and a measurable length.

Geometry

Open term →

Segment Bisector

A line, ray, or segment that divides a segment into two congruent parts.

Geometry

Open term →

Sequence of Transformations

Two or more transformations performed in a specific order.

Geometry

Open term →

Set Notation

Symbols and conventions used to describe sets of numbers or objects.

Algebra 1

Open term →

Showing 12 of 256 terms

Every term here is pulled straight from our Algebra 1 and Geometry courses—where the same visuals come to life in full video lessons.

See the courses →

bottom of page