iReady Math U8 Flash cards

Front

Acute Triangle

Back

A triangle with all angles less than 90°.

Front

Center of a Circle

Back

The point that is equidistant from all points on the circle.

Front

Circle

Back

A round plane figure whose boundary consists of points equidistant from the center.

Front

Diameter

Back

A straight line passing from side to side through the center of a circle or sphere.

Front

Obtuse Triangle

Back

A triangle with one angle greater than 90°.

Front

Radius

Back

A straight line from the center to the circumference of a circle or sphere.

Front

Right Triangle

Back

A triangle with one 90° angle.

Front

Concave Polygon

Back

A polygon with at least one interior angle greater than 180°.

Front

Convex Polygon

Back

A polygon with all interior angles less than 180°.

Front

Polygon

Back

A plane figure with at least three straight sides and angles, typically five or more.