Question | Answer |
an exact location in space | point |
a straight path that extends without end in opposite directions | line |
a flat surface that extends forever | plane |
a part of a line between two endpoints | segment |
a part of a line that starts at one endpoint and extends forever | ray |
an angle that measures 90 degrees | right angle |
an angle that measures less than 90 degrees | acute angle |
an angle that measures greater than 90 degrees but less than 180 degrees | obtuse angle |
two angles whose measures add up to 90 degrees | complementary angles |
two angles whose measures add up to 180 degrees | supplementary angles |
having the same size and shape | congruent |
a pair of opposite congruent angles formed by intersecting lines | vertical angles |
lines in a plane that do not intersect | parallel lines |
lines that intersect to form right angles | perpendicular lines |
a line that intersects two or more lines | transversal |
the theorem that states that the measures of the angles in a triangle add up to 180 degrees. | Triangle Sum Theorem |
a triangle with all angles measuring less than 90 degrees | acute triangle |
a triangle with one right angle | right triangle |
a triangle with three congruent sides and three congruent angles | equilateral triangle |
a triangle with at least two congruent sides and two congruent angles | isoceles triangle |
a triangle with no congruent sides and no congruent angles | scalene triangle |
a closed plane figure formed by three or more segments | polygon |
a closed plane figure with sides and angles of equal measures | regular polygon |
a quadrilateral with exactly one pair of parallel sides | trapezoid |
a four sided polygon | quadrilateral |
a quadrilateral with four right angles | rectangle |
a quadrilateral with two pairs of parallel sides | parallelogram |
a quadrilateral with four congruent sides | rhombus |
a quadrilateral with four right angles and four congruent sides | square |
a five sided polygon | pentagon |
a six sided polygon | hexagon |
an eight sided polygon | octogon |
a quadrilateral with two adjacent sets of congruent sides | kite |