click below
click below
Normal Size Small Size show me how
Math Vocab 6
Term | Definition |
---|---|
protractor | a tool used to measure angles |
acute angle | an angle less than 90 degrees |
obtuse angle | an angle greater than 90 degrees |
straight angle | an angle that measures 180 degrees |
right angle | an angle equal to 90 degrees |
center | the point inside a circle that is the same distance from all the points on the circle |
chord | a segment whose endpoints lie on a circle |
diameter | the distance across a circle through its center |
radius | a line segment that has one endpoint on a circle and the other endpoint at the center of the circle |
scalene triangle | a triangle with no equal sides |
isosceles triangle | a triangle with two equal sides |
equilateral triangles | all sides of the triangle are equal in length |
acute triangle | a triangle with 3 acute angles |
obtuse triangle | a triangle with exactly one obtuse angle |
right triangle | a triangle with exactly one right angle, 90 degrees |
hypotenuse | the side opposite the right angle in a right triangle |
leg | the 2 sides of a triangle that form the right angle |
line | an infinite amount of points that extend forever in two directions (symbol has an arrow on both ends) |
line segment | a portion of a line that contains two endpoints (symbol is just a straight line) |
ray | a part of a line that begins at a point and extends in one direction without end (symbol has an arrow on one end) |
parallel lines | two lines that never intersect |
perpendicular lines | two lines that intersect to form four right angles |