Question | Answer |
acute angle | an angle with a measure between 0º and 90º |
angle | two RAYS with a common endpoint |
CONGRUENT line segments | line segments that have EXACTLY the same LENGTH |
degree | a unit for measuring angles |
EQUILATERAL triangle | a triangle with three CONGRUENT sides and angles |
image | the result after a geometric figure has been TRANSFORMED |
INTERSECTING lines | LINES that meet or CROSS at a common POINT |
ISOSCELES triangle | a triangle with at least 2 sides the SAME length and 2 EQUAL angles |
obtuse angle | an angle that measures between 90º and 180º |
PARALLEL lines | lines that are the same distance apart; DO NOT INTERSECT |
parallelogram | a QUADRILATERAL with four sides in which each pair of OPPOSITE sides are PARALLEL and CONGRUENT |
PERPENDICULAR lines | LINES that cross each other at RIGHT ANGLES |
quadrilateral | a POLYGON that has 4 sides and 4 angles |
rectangle | a QUADRILATERAL with four RIGHT angles; OPPOSITE sides are EQUAL and PARALLEL |
REFLECTION | a figure that is FLIPPED over a line to create a MIRROR image of that figure |
rhombus | a PARALLELOGRAM with four CONGRUENT sides |
right angle | an angle with a measure of 90º |
ROTATION | TURNING a figure about a fixed point |
SCALENE triangle | a triangle with NO CONGRUENT SIDES OR ANGLES |
square | a rectangle with four CONGRUENT SIDES |
TRANSFORMATION | a movement of a figure that does NOT CHANGE the SIZE or SHAPE of that figure |
TRANSLATION | SLIDING a figure in a STRAIGHT LINE horizontally, vertically, or diagonally |
trapezoid | a QUADRILATERAL with EXACTLY one pair of PARALLEL sides |