Question | Answer |
ray | a part of a line that has one endpoint and extends without end in one direction |
angle | a figure formed by two rays or line segments with a common endpoint |
line | a straight path that goes on forever in opposite directions |
perpendicular | lines,line segments,or rays are perpendicular if they form right angles |
parallel | the same distance apart at every point |
oblique | lines that are not parallel or perpendicular |
intersect | to cut or divide by passing through or across |
protractor | a tool used to measure angles |
degree | a unit for measuring angles and temperature |
right angle | an angle that measures 90 degrees |
straight angle | an of 180 degrees |
supplementary angle | angles having a sum of 180 degrees |
complementary angles | angles having a sum of 90 degrees |
opposite angle | when two lines intersect the angles formed are opposite angles |
vertical angle | pairs of opposite angles formed by intersecting lines |
polygon | a closed plane figure with sides made of straight line segments |
congruent | exactly the same size and shape |
isosceles triangle | a triangle with at least two congruent sides |
equilateral triagle | a triangle with all equal sides |
scalene triangle | a triangle with no equal sides |
acute triagle | a triangle with three acute angles |
obtuse triangle | |
right triagle | |
right trapezoid | |
circle | a plane figure that forms a closed path so that all the points on the path are the same distance from a point called the center |
reflex angle | an angle greater than 180 degrees |