GEOMETRY IN THE REAL WORLD

Robbie StricklinBlock 2

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Point

A definite position with no height The dots under DOWN or QUARTER are

points

Line Segment

A finite section of line. A foul line in baseball is a line segment.

Plane

A flat or level surface generated by a straight line moving at a constant velocity with respect to a fixed point.

A basketball court is a plane.

Angle

Space within two lines or three or more planes diverging from a common point, or within two planes diverging from common line.

The bottom left and bottom right of the goal post are angles

Perpendicular Lines

Lines that intersect to form four or more 90 degree angle.

The intersecting lines in the bottom left corner are perpendicular.

Parallel Lines

Two or more lines that are equidistant at all points and never converge or intersect.

The opposite out of bounds lines are parallel.

Triangle

A closed three-sided polygon consisting of three angles and three sides with the sum of the angles equaling 180 degrees.

The billiards rack is a triangle.

Right Triangle

A triangle consisting of a right angle and two acute angles.

The top left and top right of the goal are right angles.

Pentagon

A closed polygon with five sides and five angles.

Home plate is a pentagon.

Hexagon

A polygon with six sides and six angles. Each section on the net is a hexagon.

Square

A rectangle having all four sides and four angles congruent.

The four square court is a square.

Rectangle

A parallelogram having four right angles. The pool is a rectangle.

Trapezoid

A quadrilateral plane figure having two parallel sides and two nonparallel sides.

The aerobic blocks ABC side are trapezoids.

Parallelogram

A quadrilateral having both pairs of opposite sides parallel to each other.

The nine-ball rack is a parallelogram.

Circle

A closed plane curve consisting of all the points consisting at a given distance from a point within it called a center.

The basketball rim is a circle.

Cylinder

A surface or solid bounded by two parallel planes and generated by a straight line moving parallel to the given planes and tracing a curve bounded by the planes and lying in a plane perpendicular or oblique to the given planes.

The hockey puck is a cylinder.

Sphere

A solid geometric figure generated by the revolution of a semicircle about its diameter; a round body whose surface is at all points equidistant from the center.

The volleyball is a sphere.

Octagon

A polygon with eight angles and eight sides.

The UFC ring is an octagon.

Oval

Ellipsoidal or elliptical. The hockey rink is an oval

Cube

A solid bounded by six equal squares, the angle between any two adjacent faces being a right angle.

The baseball case is a cube.