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27 questions all stuffed in to the same circle gives students a real challenge. This puzzle is great for any high school geometry lesson on circles. It contains angles with their vertex in the circle, on the circle, and outside of the circle. These angles are all made using diameters, chords, secants and tangents.

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from Teachers Pay Teachers

Properties of Circles Maze ~ Arcs, Tangents, Secants, & Inscribed Polygons

This is a maze composed of 11 circles that students must use the properties of circles to find missing angles and lengths. G.12A Apply theorems about circles, including relationships among angles, radii, chords, tangents, and secants, to solve non-contextual problems

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Ok this is pretty cool, Music Major People!

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Relationship between sound and color. If you could actually "hear" the extremely high frequencies the red, yellow and blue (primary color) light waves are vibrating at... you would hear a Major chord. If you could "see" the sound of notes in a major chord relative to the same "rainbow scale" used by light, you would see notes and chords in primary color

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Provides basic application practice with chords, arcs and angles in and out of circles. Models applications involving tangents, secants and chords ...

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Middle School OCD: Circles, Supplementary, & Complementary Angles

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Circles: Circumference, Area, Arcs, Chords, Secants, Tangents, Power of the Point. Theorems. All the links are here

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Bridget Riley, Richard Feigen Galley New York

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