A blog about teaching and learning in a maths classroom.

GeoGebra

Also see my profile on GeoGebraTube.

Adjacent Angles

Angles on opposite sides of a common arm are called adjacent angles.
AD is the common arm.

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Alternate Angles

Alternate angles on parallel lines.

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Angle between two lines

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Angles

Display angles from 10° to 90° in 5° increments.

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Angles at a point

Angles at a point add up to 360°.
Revolution equals 360°.

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Angles in a Right Angle

Angles in a Right Angle add up to 90°.

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Angles on a Straight Line

Angles on a Straight Line add up to 180°.

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Cointerior Angles

Cointerior angles on parallel lines.

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Corresponding Angles

Corresponding angles on parallel lines.

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Parts of a Circle

Investigate the parts of a circle. Turn on/off parts of the circle. Move some points to see how a part can look different.

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Perpendicular distance of a point from a line

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R-A-Triangle_23

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R-A-Triangle_46

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Understanding absolute value

An applet to consider the absolute value of an algebraic expression.

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Vertically Opposite Angles

Vertically opposite angles are equal.

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