Geometry Concepts and Measurements

Circle and Related Concepts

• Center: Point equidistant from all points on a circle.
• Circle: Round figure defined by points at an equal distance from the center.
• Circumference: Total distance around a circle.
• Diameter: Line segment that runs through the center, connecting two points on the circle's boundary.
• Radius: Line segment from the center to any point on the circumference, half of the diameter.

Geometric Figures

• Composite Figure: Formed by combining simpler geometric shapes.
• Regular Pyramid: Pyramid with a base that is a regular polygon and lateral faces that are congruent isosceles triangles.

Surface and Volume Measurements

• Lateral Face: Any face of a polyhedron that is not a base.
• Lateral Surface Area: Total area of all lateral faces in a solid object.
• Surface Area: Overall area covering the external surface of an object.
• Volume: Total space contained within a solid object.

Special Terms and Formulas

• Semicircle: Half of a circle.
• Slant Height: Height measured from the base to the apex along the lateral face of a pyramid.
• Pi (π): Mathematical constant representing the ratio of circumference to diameter, approximately 3.14 or expressed as 22/7.

Formulas

• Area of a Circle: Calculated using the formula A = πr², where r is the radius.
• Circumference of a Circle: Given by the formula C = 2πr, where r is the radius.