Geometry Exam!!!!!! Ahhhhhh!!!!!!!!
Study!!!!!!!!!!!!!
Terms
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- line
- a straight arrangement of infinately many points, 1-dimensional
- 3 sides
- triangle
- points, lines, and planes
- the three basic building blocks in geometry
- equilateral polygons
- all sides have equal length
- deductive reasoning
- the process of showing that certain statements follow logically from agreed-upon assumptions and proven facts`
- tangent
- a line that intersects a circle in exactly one point
- regular polygons
- a polygon that is both equilateral and equiangular
- 135 degrees
- one angle of a regular octagon measures
- equiangular polygons
- all angles have equal measure
- 4 sides
- quadrilateral
- line segment
- two points and all the points between them that are on the line containing them
- 6 sides
- hexagon
- plane
- flat surface that extends infinately, 2-dimensional
- 7 sides
- heptagon
- 10 sides
- decagon
- parallel
- the midsegment of a trapezoid is ________ to the bases
- 8 sides
- octagon
- point
- has no size, only location and its 0-dimensional
- chord
- a line segment whose endpoints lie on a circle
- endpoints
- the points at the end of a line segment or arc
- kite
- one pair of opposite congruent angles, one diagonal bisects it, its diagonals are perpendicular, and it has exactly one side of symmetry
- diagonal
- a line segment connecting non-consecutive vertices in a polygon
- isosceles trapezoid
- one opposite side is parallel, one pair of opposite congruent angles, its base angles are congruent, its consecutive are supplementary, its diagonals are congruent, and it has exactly one line of symmetry
- "skew" lines
- lines not on the same plane that do not intersect and are not parallel
- rhombus
- both opposite sides are parallel, both opposite sides and angles are congruent, its consecutive angles are supplementary, its diagonals bisect each other and are perpendicular, and it has exactly two lines of symmetry
- n
- n-gon
- pair of vertical angles
- angles formed by two intersecting lines
- average
- the length of a midsegment of a trapezoid is the _______ of the lengths of the bases
- 4 congruent triangles
- the three midsegments of a triangle divide the triangle into
- 11 sides
- undecagon
- ray
- all the points on a line that lie on one side of a specified point
- geometric construction
- uses a compass and a straighedge
- 9 sides
- nonagon
- 12 sides
- dodecagon
- square
- both opposite sides are parallel, both opposite sides and angles are congruent, consecutive angles are supplementary, its diagonals bisect each other, are perpendicular, and are congruent, it has exactly four lines of symetry
- congruent
- lines are all _________ if they all intersect at one point
- half
- the length of a midsegment between two sides of a triangle is ____ the length of the third side
- diameter
- largest chord in a circle
- 5 sides
- pentagon
- vertex angle
- angle between two sides of equal length
- inductive reasoning
- the process of observing data, recognizing patterns, and making generalizations about those patterns
- conjecture
- the generalization you make when you use inductive reasoning
- triangles are congruent
- if two angles and a non-included side of one triangle are congruent to two angles and a non-included side of another triangle
- median
- a line segment with endpoints at the vertex and at the midpoint of the opposite side
- rectangle
- an equiangular quadrilateral is usually called a...
- CPCTC
- corresponding parts of congruent triangles are congruent
- 1440 degrees
- the sum of the measure of the interior angles of a decagon
- centroid
- center of gravity of a triangle
- rectangle
- both opposite sides are parallel, both opposite sides and angles are congruent, consecutive angles are supplementary, its diagonals bisect each other, its diagonals are congruent, and it has exactly two lines of symmetry
- parallelogram
- both opposite sides are parallel, both opposite sides are congruent, both opposite angles are congruent, its consecutive angles are supplementary, its diagonals bisect each other, and it has no line of symmetry
- linear pair of angles
- two angles that share a vertex and a common side and their non-common sides form a line