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9-12 Geometry Unit 6

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K-5 Math 6-8 Math •9-12 Math

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Algebra 1 •Geometry Algebra 2 Extra Support Materials for Algebra 1

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Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 •Unit 6 Unit 7 Unit 8

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K-5
6-8
9-12

Algebra 1
Geometry
Algebra 2
Extra Support Materials for Algebra 1

Integrated Math 1
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Integrated Math 3

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Unit 4
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Unit 6
Unit 7
Unit 8

Modeling Prompts

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IM K-5 Math
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Learning Targets

Unit 6

Glossary

Geometry

directrix

A directrix is the line that, together with a point called the focus, defines a parabola.

This diagram shows a parabola is the set of points equidistant from the focus and directrix.

used in:

focus

A focus is the point that, together with a line called the directrix, defines a parabola.

This diagram shows a parabola is the set of points equidistant from the focus and directrix.

used in:

median (geometry)

A median is a line drawn from a vertex of a triangle to the midpoint of the opposite side.

Each dashed line segment in this image is a median.

used in:

opposite

Two numbers are opposites if they are the same distance from 0 on the number line, but on opposite sides. One is negative, and the other is positive.

From an earlier course.

parabola

A parabola is the set of points that are equidistant from a given point, called the focus, and a given line, called the directrix.

used in:

point-slope form

Point-slope form is one way to write the equation of a line using its slope and the coordinates of one point on the line.

For a line with slope through the point , point-slope form is usually written as . It can also be written as .

<p>A line with point h comma k on an x y axis.</p>

used in:

reciprocal

Two numbers that multiply to equal 1 are reciprocals.

If is a rational number that is not 0, then the reciprocal of is the number .

used in: