Geometry In The Real World

Meredith Bach

B.2

Point

• A point is the exact location in space.

Line Segment

• A line segment is a line between two different points.

Plane

• A plane is a flat surface that extends forever.

Angle

• An angle is two rays sharing a common endpoint, which is the vertex.

Perpendicular Lines

• Perpendicular lines are lines that intersect forming a right angle.

Parallel Lines

• Parallel lines are lines that are the same distance apart at any given point, and they never intersect.

Triangle

• A triangle is a three-sided polygon.

Right Triangle

• A right triangle is a triangle with a 90° angle.

Pentagon

• A pentagon is a polygon with five sides.

Hexagon

• A hexagon is a polygon with six sides.

Square

• A square is a polygon with four equal sides.

Rectangle

• A rectangle is a parallelogram with four right angles and two sets of parallel lines.

Trapezoid

• A trapezoid is a four-sided figure with one pair of parallel lines.

Circle

• A circle is a plane curve everywhere equidistant from a given fixed point.

Cylinder

• A cylinder is a three- dimensional solid with two parallel circular ends.

Parallelogram

• Quadrilateral with two pairs of parallel sides.

Sphere

• A sphere is a perfectly round geometrical object in three-dimensional space.

Octagon

• An octagon is an eight-sided polygon.

Acute Triangle

• An acute triangle is a triangle with its angles less than 90°.

Obtuse Angle

• An obtuse triangle is a triangle with an angle larger than 90°.