213260142-Solid-Mensuration-Chapter-1.pptx - SOLID MENSURATION MATH 18 JHON REY C SARDIDO Plane Figures Solid Mensuration Jhon Rey C Sardido

# 213260142-Solid-Mensuration-Chapter-1.pptx - SOLID...

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JH O N R E Y C . S A RD I D O SOLID MENSURATION MATH 18
Plane Figures Jhon Rey C. Sardido Solid Mensuration
Polygons A polygon is a closed plane figure formed by line segments. Parts of a Polygon 1. The side or edge of a polygon is one of the line segments that make up the polygon. Adjacent sides are pairs of sides that share a common endpoint. 2. The vertices of a polygon are the end points of each side of the polygon. Adjacent vertices are endpoints of a side. 3. A diagonal of a polygon is a line segment joining two non-adjacent vertices of the polygon. 4. An interior angle is the angle formed by two adjacent sides inside the polygon. 5. An exterior angle is an angle that is adjacent to and supplementary to an interior angle of the polygon. Side or Edge Vertex Diagonal Interior Angle Exterior Angle A polygon may also be defined as a union of line segments such that:
Types of Polygons 1. Equiangular Polygon A polygon is equiangular if all of its angles are congruent. 2. Equilateral Polygon A polygon is equilateral if all of its sides are equal. 3. Regular polygon Regular polygons are both equiangular and equilateral. 4. Irregular Polygon A polygon that is neither equiangular nor equilateral is said to be an irregular polygon. 5. Convex Polygon Every interior angle is less than 180°. If a line is drawn through the convex polygon, the line will intersect at most two sides. 6. Concave Polygon A concave polygon has at least one interior angle that measures more than 180°. If a line is drawn through a concave polygon the line mat intersect more than two sides. An example of a convex polygon An example of a concave polygon Richard T. Eanhart Solid Mensuration: Understanding the 3D Space