Question | Answer |
All sides are the same length | Equilateral triangle |
At least 2 sides are the same length | Isosceles triangle |
No sides are the same length | Scalene triangle |
One angle is a right angle | Right angle |
All three sides are acute angles | Acute triangle |
One angle is obtuse | Obtuse triangle |
There are four right angles | Rectangle |
There are four right angles and all sides are the same length | Square |
There is only one pair of parallel sides | Trapezoid |
Opposite sides are parallel | Parallelogram |
Opposite sides are parallel and all sides are the same length | Rhombus |
A closed plane figure made up of all the points the same distance from the center | Circle |
Point in the middle of a circle | Center |
Any line segment that connects two points on the circle | Chord |
Any line segment that connects the center to a point on the circle | Radius |
Any line segment that connects two points on the circle and passes through the center | Diameter |
Figures with the same size and shape | Congruent |
move a figure in a straight direction | slide or transition |
Gives figure a mirror image | flip or reflection |
Moves a figure about a point | turn or rotation |
Figures are this when it can be folded into 2 congruent halves that fit on top of each other | Symmetric |
A line on which a figure can be folded so that both halves are congruent | Line of symmetry |
Same shape but may not have have the same size | Similar figures |