MATHEMATICS| POLYGON AND CIRCLE

• Polygon - is an closed figure whose line segment intersect at their endpoints
• Sides - the line segments of a polygon
• Vertex - an corner of a polygon where two sides intersect
• Interior angle - angle formed by two sides at a vertex
• Each interior angle angles of a polygon is less than 180°
• Triangle sum theory - the sum of interior angles of a triangle is 180°
• Circle - is the set of all points on a plane with a constant distance from a fixed point called the center of the circle
• Radius- the equal distance from the center to any point on the circle
• Chord - a segment whose endpoints lie on the circle
• Diameter - A chord that passes through the center of the circle
• Arc - A section of a circle
• Central angle - an angle whose vertex is at the center of the circle and whose sides are the radii of the circle
• Major arc - Arc that measures more than 180°
• Minor arc- Arc less than 180°