Polygons and Lines words Flashcards
parallell lines
lines that never cross
intersecting lines
lines that cross once at any angle
perpendicular lines
lines that cross at exactly 90 degrees
polygon
a shape that has straight edges, closed shaped, and at least 3 sides
equilateral triangle
triangle with all equal sides and equal angles
isosceles triangle
triangle with TWO sides and TWO angles the same measure
scalene triangle
triangle with NO sides or angles the same measure
right angle
a 90 degree angle
obtuse angle
an angle greater than 90 degrees but less than 180 degrees
acute angle
an angle less than 90 degrees
reflex angle
an angle greater than 180 degrees but less than 360 degrees
straight angle
an angle that is exactly 180 degrees
concentric circles
circles of different shapes, but same shape
similar shapes
polygons that are same in shape, but different size
translation
to move an object without changing its figure (slide)
