Geometric Objects

By: Connor ZalesakBlock 5 P-AP Geometry

Point

• Names a location• Has no size• Represented by a dot

Line

• Straight path• Has no thickness• Extends forever• There is one between any two points

Plane

• Flat surface• Has no thickness• Extends forever

Angle

• A figure formed from two rays with a common endpoint

Perpendicular Lines

• Intersect at a 90 degree angle

Parallel Lines

• Never intersect• Extend forever

Triangle

• Three sided polygon• 180 degrees

Right Triangle

• Three sided polygon• 180 degrees• The two “legs” make a right angle

Pentagon

• Five sided polygon• 540 degrees

Hexagon

• Six sided polygon• 720 degrees

Square

• Four sided polygon• 360 degrees• Every side and angle is congruent

Rectangle

• Four sided polygon• 360 degrees• The sides parallel to each other are the same

length• All angles are congruent

Trapezoid

• Four sided polygon• 360 degrees• Top and bottom are parallel, sides aren’t

Parallelogram

• Four sided polygon• 360 degrees• Opposite sides are parallel• Opposite angles are congruent

Circle

• The side is always one set distance from the center

• 360 degrees• No angles

Cylinder

• 3-dimensional figure• 2 Parallel congruent base ends are circles• Curved lateral surface connects bases

Sphere

• The side is always one set distance from the center

• One smooth curved lateral surface

Dodecahedron

• Twelve-sided 3-d figure• Made of pentagons• 3 faces meet at each vertex

Decahedron

• 10 sided 3-d figure• Made of triangles

Cube

• Six- sided 3-d figure• All sides, angles, and edges are congruent