vocab1
irregular polygon
side lengths and angle measures are not congruent
volume
measure of how much space is inside a figure
chord that goes through the center of a circle; measures distance across the circle
diameter
a single, flat surface
face
congruent
Figures have the same size and shape.
equal
line segment; joins center of circle to another point
radius
Plane geometry
flat shapes; shapes that can be drawn on a piece of paper; is two-dimensional (2D)
three dimensional (3D)
There are three dimensions: width, length, and height.
transformation
A change in the size, shape, or position of a figure. This creates a new figure.
translation
A new image is formed by moving every point in the same direction and distance.
also called a slide
polygon
closed, 2D shape; has sides made up of lines; shape with straight edges
chord
line segment connecting any two points on a circle
no angles pointing inwards
convex polygon
a set of points in a plane; points are same distance away from the center
circle
edge
the sides; the lines
four sides; a shape with four sides
quadrilateral
regular polygon
side lengths and angle measures are congruent
distance around a circle
circumference
vertices
point where the edges meet
rotation
A new image is formed by rotating around a point or around a center of rotation.
also called a turn
shape's opposite sides are parallel; the opposite sides are equal in length
angles add up to 360 degrees
4 sides and verticies
parallelogram
have an angle pointing in
concave polygon
line segment where two faces meet
edge/sides
surface area
total area of the surface
A new image is formed by reflecting, or flipping, over the line of reflection...also called a flip
reflection