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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

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

Glide Reflection

A transformation that combines a translation and a reflection.

Geometry

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Greatest Common Factor

The greatest factor that two or more numbers or expressions have in common.

Algebra 1

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Horizontal

Describing a line or direction that goes left and right.

Algebra 1

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Horizontal Shift

A transformation that moves a graph left or right.

Algebra 1

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Horizontal Shrink

A transformation that compresses a graph horizontally toward the y-axis.

Algebra 1

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Horizontal Stretch

A transformation that makes a graph wider by stretching it horizontally.

Algebra 1

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Hypotenuse

The longest side of a right triangle, opposite the right angle.

Geometry

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Hypotenuse-Leg (HL) Congruence Theorem

If the hypotenuse and one leg of two right triangles are congruent, the triangles are congruent.

Geometry

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Image

The figure that results after a transformation is applied to a preimage.

Geometry

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Included Angle

The angle between two specified sides of a triangle.

Geometry

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Independent Variable

The input value that can be chosen or changed independently.

Algebra 1

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Inequality

A statement that compares two expressions using symbols such as <, >, ≤, or ≥.

Algebra 1

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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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