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16 Cards in this Set
- Front
- Back
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acute angle
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An angle that measures less than 90 degrees.
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adjacent angles
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Angles that have one shared side. They are "next door" neighbors.
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arc
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Part of a circle
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Congruent
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Exactly the same.
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Diameter
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The distance from one side of a circle to the other.
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Equilateral triangle
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A triangle that has 3 angles that are the same size and 3 sides that are the same length.
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Isosceles triangle
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A triangle that has 2 angles that are the same size and 2 sides that are the same length.
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Obtuse angle
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An angle that is bigger than 90 degrees but smaller than 180 degrees.
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Pentagon
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A five sided polygon.
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Perimeter
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The measurement around the outside of a shape.
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Radius
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The distance from the center point of a circle to the side of the circle.
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Reflex angle
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An angle that is bigger than 180 degrees but smaller than 360 degrees.
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Regular polygon
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A polygon that has sides that are the same length and angles with the same measurement.
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Right angle
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An angle that is 90 degrees.
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scalene triangle
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A triangle with no angles that are the same size and no sides that are the same length.
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vertical (or opposite) angles
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Angles that share a vertex but are opposite of each other.
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