Geometry Topics

Illustrative diagram of a circle with labeled parts, including the radius, diameter, center, sector, arc, chord, segment, circumference, and tangent.

The Parts of a Circle

A circle is defined by several distinct parts, each integral to its geometry. Key elements include the radius, the line segment from the center to the circumference; the diameter, which is twice the radius and spans the circle through its center.

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Set of six triangles showcasing various types: equilateral, isosceles, scalene, equiangular, acute, right, and obtuse triangles.

Types of Triangles

Triangles can be classified based on their sides and angles. By sides there are three types: equilateral (all sides equal), isosceles (at least two sides equal), and scalene (no sides equal).

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