TEST THURSDAY GEOMETRY Flashcards
(42 cards)
Closed plane figure made up of line segments only joining at their endpoints *segments cannot be collinear
Regular Polygon (360/360 divided by n only applies to regular polygons!)
All interior angles are less than 180 degrees, no diagonals with points outside polygon
Convex Polygons
At least one interior angle greater than 180 degrees, reflexive angle present, at least one diagonal with points outside polygon
Concave Polygon
All sides and angles are congruent in a polygon
Regular polygon
triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, decagon, dodecagon
prefix polygons
The sum of the measures of the interior angles of the polygon with “n” sides, (n-2)180 (divide by n again to get individual angle measure)
Polygon Angle-Sum Theorem
The sum of the measures of the exterior angles of a polygon are always 360 degrees
Polygon Exterior Angle-Sum Theorem
Opposite sides are parallel & congruent, opposite angles are congruent and consecutive angles are supplementary. diagonals bisect each other.
classification of a parallelogram
All the properties of a parallelogram, four right angles, diagonals are congruent
classification of a rectangle
all properties of a parallelogram, rectangle, and rhombus
classification of a square
all properties of a parallelogram, all sides are congruent. The diagonals bisect the angles and are perpendicular
classification of a rhombus
at least one pair of parallel sides present
classification of a generalized trapezoid
non parallel lines are congruent, base angles are congruent, and opposite angles are supplementary
classification of an isosceles trapezoid
two pairs of adjacent sides are congruent, one pair of opposite angles are congruent, one diagonal bisects the other, and diagonals are perpendicular
classification of a kite
diagonals in a RECTANGLE are…
congruent
diagonals in a RHOMBUS are…
Perpendicular and bisect each other
What is the one generalization for all trapezoids?
At least ONE pair of parallel lines
Diagonals for a KITE are…
perpendicular and one diagonal bisects the other
how many pairs of adjacent sides are in a kite?
2 congruent pairs of adjacent sides
how many pairs of angles are in a kite and what type of angles are they?
One pair of OPPOSITE CONGUENT angles
Which parts are congruent in an isosceles trapezoid?
Non parallel sides and base angles are congruent in an isosceles trapezoid
Which angles are supplementary in an isosceles trapezoid?
opposite angles are supplementary in a trapezoid
What are the sides’ relationships with each other in a rhombus
all of the sides in a rhombus are congruent
what is the classification of the angles in a rectangle?
there are 4 right angles in a rectangle
