I nailed it Mr. Nelson #11

Author:nelsone

The altitudes of any triangle meet at a single point called the ORTHOCENTER. (An altitude is the perpendicular line segment from a vertex of a triangle to the opposite side of the vertex.)

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Reflection = 180° Rotation about a Line
Nikmati Keunggulan Di Bandar Judi Terpercaya
Triangle with 3 Right Angles
Reflection Across 2 Parallel Lines
Equation of Locus - Parabola

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Start, parallel to line through point
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DrBobCubica2
การลบจำนวนเต็ม

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Bar Chart or Bar Graph
Volume
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Equations