Geometry in the Real World

By: Myranda Ozuna2nd Block

Point

Point: An undefined term in geometry, it names a location an has no size.

Line (Segment)

Line (Segment): A straight line which links two points without extending beyond them.

Plane

Plane: an undefined term in geometry, it is a flat surface that has no thickness an extends forever.

Angle

Angle: A figure formed by two rays with a common endpoint.

Perpendicular Lines

Perpendicular Lines: lines that intersect at 90° angles.

Parallel Lines

Parallel Lines: Lines that do not intersect.

Triangle

Triangle: A three-sided polygon.

Right Triangle

Right Triangle: A triangle with one right (90°) angle.

Pentagon

Pentagon: A five-sided polygon.

Hexagon

Hexagon: A six-sided polygon.

Square

Square: A quadrilateral with four congruent sides an four congruent right (90°) angles.

Rectangle

Rectangle: A quadrilateral with four right (90°) angles.

Trapezoid

Trapezoid: A quadrilateral with exactly one pair of parallel lines.

Parallelogram

Parallelogram: A quadrilateral with two pairs of parallel lines.

Circle

Circle: The set of points in a plane that are a fixed distance from a given point called the center of a circle.

Cylinder

Cylinder: A three-dimensional figure with two parallel congruent circular bases and a curved lateral surface that connects the bases.

Sphere

Sphere: The set of points in space that are a fixed distance from a given point called the center if the sphere.

Cube

Cube: A prism with six square faces.

Rhombus (Diamond)

Rhombus: A quadrilateral with four congruent sides, which is often called a diamond.

Decagon (Star)

Decagon: A ten-sided polygon, which is often called a star.