Vocabulary for GEOMETRY Flashcards
polygon
a shape with sides and vertices
equilateral
sides are congruent
equilangular
angles are congruent
A ___________ is a quadrilateral with both pairs of opposite sides parallel.
parallelogram
In a parallelogram opposite sides are __________
congruent
In a parallelogram opposite angles are __________
congruent
In a parallelogram consecutive angles are _____________
supplementary
In a parallelogram diagonals ________ each other
bisect
A rhombus is a parallelogram with four __________
congruent sides
A rectangle is a parallelogram with four __________
right angles
A square is a parallelogram with four ____________ and four ________
congruent sides, right angles
A trapezoid is quadrilateral with exactly one pair of ________
parallel sides
the parallel sides of a trapezoid are called ______
bases
The non-parallel sides of a trapezoid are called ________
legs
The two angles that share base are called ____________
base angles
An isosceles trapezoid is trapezoid with __________ legs.
congruent
The midsegment of a trapezoid is the segment that joins the _________ of its legs.
midpoints
The midsegement is parallel to the ________
bases
A kite is a quadrilateral with two pairs of ____________ sides ____________
consecutive, congruent
The height of a trapezoid is the __________ distance between the bases
perpendicular
A ________ polygon is a polygon with all sides and angles congruent.
regular
The _________ of any regular polygon is the point exactly
center
The __________ of a regular polygon is the distance from the center to a vertex.
radius
The __________ of a regular polygon is the perpendicular distance from the center to a side. It also bisects the angle and opposite sides.
apothem
The radii of a regular polygon form __________ triangles
isoceles
A prism is a polyhedron with two congruent parallel faces called ________
bases
The other faces are called ____________ and are always quadrilaterals
lateral faces
A cylinder is a solid that has two congruent parallel _______ that are circles
bases
A sphere is the set of all point sin space equidistant from the _______
center
A _________ is a segment that has one endpoint at the center and one on the sphere
radius
A ________ is a segment passing through the center with endpoints on the sphere
diameter
A transformation in the coordinate plane that preserves _______ and ________
shape and size
Pre image is
the original image before a transformation
Image is
new or resulting image from a transformation
Rotation: a circular movement of an object around a fixed point of rotation, known as the ______________
center of rotation
An ___________ is a transformation that preserves distance, or length.
isometry
A composition of reflection across two parallel lines is a ______________
translation
A composition of reflections across two intersecting lines is a ____________
rotation
A glide reflection is combination of _________
translation and reflection
Two figures are __________ if and only if there is a sequence of rigid motions that maps one figure onto the other
congruent
A scale factor is a number that is multiplied to ______ or _______ a figure
enlarge or reduce
