Annulus

A flat shape like a ring, or a flattened donut. Its edges are two circles that have the same center (called "Concentric Circles").

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Other Definitions with Letter A

• Abacus
• Abscissa
• Absolute Value
• Accelaration
• Accuracy
• Acre
• Acute Angle
• Acute triangle
• Add
• Addend
• Addition
• Additive Identity
• Additive Inverse
• Adjacent
• Adjacent Angles
• Algebra
• Algorithm
• Alternate exterior angle
• Alternate interior angle
• Altitude
• Altitude(geometry)
• AM
• Amplitude
• Analog
• Analog clock or watch
• Angle
• Angle Bisector
• Angle of Depression
• Angle of Elevation
• Annual
• Annual Percentage Rate(APR)
• Annual Percentage Yield(APY)
• Annulus
• Anticlockwise
• Apex
• Apothem
• Approximation
• Arc
• Arc Length
• Area
• Argument
• Arithmetic
• Arithmetic Sequence
• Arm of an Angle
• Array
• Ascending Order
• Asset
• Associative Law
• Asymmetry
• Asymptote
• Attribute
• Autumn
• Average
• Axes
• Axis (geometry)
• Axis(graph)
• Axis of symmetry