Question | Answer |
a part of a line that has one endpoint and extends without end in one direction | Ray |
a figure formed by two rays | Angle |
a straight path that goes on forever | Line |
lines,line segments,or rays that are 90 degrees | Perpendicular |
the same distance apart at every point | parallel |
lines that are not parallel or perpendicular | Oblique lines |
to cut or divide by passing through or across | Intersect |
a tool used to measure angles | Protractor |
a unit for measuring angles or temperature | Degree |
an angle that measures 90 degrees | Right angle |
an angle of 180 dgrees | Straight angle |
angles having a sum of 180 degrees | Supplementary angles |
angles having a sum of 90 degrees | Complementary angles |
when two angles intersect they form these angles | Opposite angle |
pairs of opposite angles formed by intersecting lines | Vertical angle |
A closed plane figure with sides made of straight line segment | Polygon |
same size same shape | Congruent |
a triangle with two congruent sides | Isosceles triangle |
a triangle with all congruent sides | Equilateral triangle |
a triangle with no congruent sides | Scalene triangle |
a triangle with three acute angles | Acute triangle |
a triangle with one obtuse angle | Obtuse triangle |
a triangle with one right angle | Right triangle |
a trapezoid with at least one right angle | Right trapezoid |
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 | circle |
an angle greater than 180 degrees | reflex angle |