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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

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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

Acute Angle

An angle that measures more than 0° but less than 90°.

Geometry

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Adjacent Angles

Two angles that share a common vertex and side but do not overlap.

Geometry

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Adjacent Sides

Two sides of a polygon that share a common endpoint.

Geometry

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Alternate Exterior Angles

Angles outside two lines and on opposite sides of a transversal.

Geometry

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Alternate Exterior Angles Converse

If alternate exterior angles are congruent, the two lines are parallel.

Geometry

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Alternate Exterior Angles Theorem

If parallel lines are cut by a transversal, alternate exterior angles are congruent.

Geometry

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Alternate Interior Angles

Angles between two lines and on opposite sides of a transversal.

Geometry

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Alternate Interior Angles Converse

If alternate interior angles are congruent, the two lines are parallel.

Geometry

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Alternate Interior Angles Theorem

If parallel lines are cut by a transversal, alternate interior angles are congruent.

Geometry

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Angle

The figure formed by two rays that share an endpoint, measured in degrees.

Geometry

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Angle Bisector

A ray or segment that divides an angle into two congruent angles.

Geometry

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Angle of Rotation

The amount and direction a figure turns around a fixed center.

Geometry

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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.

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