H Geometry Ch.1

56 terms by 13tglave

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line segment

can be measured because it has 2 endpoints


when segments have the same measure

segment bisector

any segment, line, or plane that intersects a segment at its midpoint


lines, segments, or rays that form right angles

undefined terms

terms only explained using examples and descriptions
ex: point, line, plane


a location


made up of points and has no thickness or width


points on the same line


flat surface made up of points


points that lie on the same plane


a boundless, 3D set of all points
contains lines and planes


depends on the smallest unit available on the measuring tool


for any 2 points A and B on a line, there is another point C between A and B


methods of creating geometric figures without the benefit of measuring tools

absolute error

the absolute value of the difference between the actual measure of an object and the allowable measure

relative error

the ratio of the absolute error to the actual measure

significant digits

represent the accuracy of a measurement


the point on the segment that divides the segment into 2 congruent segments


a unit of measure used in measuring angles and arcs


part of a line

opposite rays

if you choose a point on a line, that point determines exactly 2 rays


formed by 2 noncollinear rays that have a common endpoint


the rays of the angle


the common endpoint


inside an angle


outside an angle

right angle

90 degrees

acute angle

less than 90 degrees

obtuse angle

larger than 90 degrees

angle bisector

a ray that divides an angle into 2 congruent angles

adjacent angles

2 angles that lie in the same plane, have a common vertex and a common side, but no common interior points

vertical angles

2 nonadjacent angles formed by 2 intersecting lines

linear pair

a pair of adjacent angles with noncommon sides that are opposite rays

complementary angles

2 angles with measures that have a sum of 90

supplementary angles

2 angles with measures that have a sum of 180


a polygon with n sides

regular polygon

a convex polygon in which all the sides are congruent and all the angles are congruent


the sum of the length of the sides of the polygon


the distance around the circle


the # of the square units needed to cover a surface


a solid with all flar surfaces that enclose a single region of space


each flat surface (polygon)


the line segments where the faces intersect


a polyhedron with 2 parallel congruent faces


2 parallel congruent faces

regular prism

a prism with bases that are regular polygons


a polyhedron with all faces except for one intersecting at one vertex

regular polyhedron

a polyhedron if all its faces are regular congruent polygon and all of the edges are congruent

platonic solids

5 types of regular polyhedra


a solid with congruent circular bases in a pair of parallel


a circular base and a vertex


a set of points in space that are a given distance from a given point

surface area

the sum of the areas of each face of a solid


the measure of the amount of space the solid encloses

orthographic drawing

the 2D views of the top, left, front, and right sides of an object


a pattern for a 3D solid

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