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# 10.1: Vocabulary Self-Rating

Difficulty Level: At Grade Created by: CK-12
Rating Guide: DK: I am sure I don’t know it K: I am sure I know it ?: I’m not sure
Word Before Lesson/Unit After Lesson/Unit
Distance
Overbar
Estimation
Estimate
Ruler
Absolute value
xy\begin{align*}x-y\end{align*} coordinate plane
x\begin{align*}x-\end{align*}coordinate
y\begin{align*}y-\end{align*}coordinate
Right triangle
Pythagorean Theorem
Distance Formula
Midpoint
Equidistant
Slope
Undefined
Parallel
Perpendicular
Slope-intercept form
y\begin{align*}y-\end{align*}intercept
Circle
Center
Leg
Hypotenuse
Concentric
Translation
Prime
Preimage
Image
Isometry
Reflection
Perpendicular bisector
Rotation
Angle of rotation
Arc
Central angle
Diameter
Acute
Complementary

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