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Gravity
Terms in this set (39)
line segment
a straight line connecting two points
ray
has one endpoint, but continues in the other direction forever; straight
line
continues on in both directions forever; straight
parallel
always the same distance apart; will never touch
intersecting
meeting or crossing
right angle
corner, square or 90 degrees
equilaterial triangle
all three sides the same size
right triangle
one right angle
angle
the measurement between two lines
vertex
point where two lines meet
sides
lines that come together at a vertex
triangle
3 sides, 3 vertices, 3 angles
perimeter
the distance around a shape
quadrangle
4 sides, 4 vertices, 4 angles
parallelogram
quadrangle with opposite sides parallel
polygon
shapes with 3 or more sides that connects
regular polygon
all sides the same size
pentagon
5 sides
hexagon
6 sides
heptagon
7 sides
octagon
8 sides
nonagon
9 sides
decagon
10 sides
dodecagon
12 sides
quarter turn
90 degrees
half turn
180 degrees
3/4 turn
270 degrees
full turn
360 degrees
symmetric
when folded along a line, both sides match
congruent
same size and shape
polyhedron
a 3D shape that has "many faces"
pyramid
the base is a polygon and the faces come together in an apex
prism
two bases are parallel to each other and are polygons
cone
the base is a circle and the sides are curved
sphere
completely round
cylinder
two circle bases and curved sides
edges
where the faces of a polyhedron meet
apex
the point at the top of a pyramid
Mrs. Cascio
your 3rd grade teacher! :)
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