Question | Answer |
What is a simple, closed figure formed by joining 3 or more segments | polygon |
What are the segments that form a polygon | sides |
What is the corner where 2 sides meet | vertex |
What is a straight set of points that goes on in 2 opposite directions forever | line |
What is a part of a line that has 2 end points and whose length can be measured | line segment |
What is a part of a line with a beginning but no ending | ray |
What are lines that are the same distance apart and will never touch | parallel lines |
What are lines that connect at a common point (vertex) | intersecting lines |
What are intersecting lines that cross at 90 degree angles | perpendicular lines |
What is a polygon whose sides and angles are all the same measure | regular polygon |
A triangle with 3 sides of equal length and 3 angles of equal measure | equilateral |
A triangle with 2 sides of equal length and 2 angles of equal measure | isosceles |
A triangle with no sides the same length or angles the same measure | scalene |
A triangle with 1 right angle | right |
A triangle with 3 acute angles | acute |
A triangle with 1 obtuse angle | obtuse |
A quadrilateral with exactly one pair of opposite sides parallel | trapezoid |
A quadrilateral with 2 pairs of opposite parallel sides | parallelogram |
A parallelogram with 4 congruent sides | rhombus |
A parallelogram with 4 right angles | rectangle |
A rectangle with 4 congruent sides | square |
Two rays with a common vertex as the mid point | angle |
An angle measuring 90 degrees | right |
An angle measuring less than 90 degrees | acute |
An angle measuring more than 90 degrees | obtuse |
An angle measuring 180 degrees | straight |
A figure can be folded in half so that both sides match exactly | line symmetry |
A figure can be rotated around a point and the figure will look exactly the same as it did in its original position | rotational symmetry |
A transformation that creates a mirror image of a figure across a line | reflection |
Moves a figure horizontally, vertically, or diagonally | translation |
Moves a figure by rotating it around a point | rotation |