PRESENTATION OUTLINE
GEOMETRY IN THE
REAL WORLD
POINT
specifies only location; no length, width, or depth, represented as a dot
LINE
continues on forever in both directions, has one dimension:length
PLANE
flat and 2 dimensional, it also continues forever in all directions
SEGMENT
part of a line between two points
PERPENDICULAR LINES
line segments that intersect at a 90 degree angle
PARALLEL LINES
line segments that are the same length apart and never intersect
ACUTE ANGLE
an angle that measures less than 90 degrees
OBTUSE ANGLE
an angle that measures more than 90 degrees
RIGHT ANGLE
an angle that measures exactly 90 degrees
VERTICAL ANGLES
lines opposite each other when crossed
CIRCLE
shape with all points the same distance from its center
SQUARE
figure with four equal straight sides / four right angles
COLLINEAR POINTS
set of points that lie in a straight line
COPLANAR POINTS
set of points that lie on the same plane
ACUTE TRIANGLE
a triangle with all angles less than 90 degrees
how to make:
perpendicular lines
