Lines
lines that run from side to side
horizontal lines
type of angle that is less than 90 degrees
acute angle
term for a "many sided figure"
polygon
shape with 7 sides
heptagon
distance from the center of a circle to its closest edge
radius
lines that run up and down
vertical lines
type of angle that is equal to 90 degrees exactly
right angle
shape with 3 sides
triangle
shape with 8 sides
octagon
distance from one side of a circle to the other side of the circle
diameter
term we use in math that means the "crossing" of lines
intersecting
type of angle that is greater than 90 degrees
shape with 4 sides
quadrilateral
shape with 9 sides
nonagon
distance around a circle
circumference
lines that intersect to form right angles
perpendicular lines
type of triangle where all the sides measure the same and all of the angles measure the same
equilateral
shape with 5 sides
pentagon
shape with 10 sides
decagon
two angles that add up to equal 90 degrees are called these
complementary angles
lines that never intersect, running alongside each other
parallel lines
type of triangle where none of the angles are equal and none of the sides are equal
scalene
shape with 6 sides
hexagon
shape with 12 sides
two angles that add up to equal 180 degrees are called these
supplementary angles