Question | Answer |
acute angle | an angle that measures less than a right angle; an angle that has a measure of less than 90 degrees |
line | a straight path that continues without ending in both directions; think Buzz Light Year "To infinity and beyond!" |
line of symmetry | an imaginary line that divides a shape into 2 matching parts |
obtuse angle | an angle that measures greater than a right angle; an angle that has a measure of more than 90 degrees |
ray | a part of a line that is straight and has one end point and continues without ending in one direction |
right angle | an angle that forms a square corner and has a measure of 90 degrees |
line segment | a part of a line that is straight and has 2 end points |
angle | a figure formed by 2 rays or 2 line segments and has a common endpoint called the vertex |
perpendicular lines | two lines that intersect to form a right angle |
parallel lines | lines that never meet |
intersecting lines | lines that meet or touch or cross |
straight angle | forms a straight line; measures 180 degrees |
polygon | closed flat shape with straight sides |
vertex | point where 2 sides of a polygon meet |
triangle | polygon with 3 sides |
quadrilateral | polygon with 4 sides |
pentagon | polygon with 5 sides |
hexagon | polygon with 6 sides |
octagon | polygon with 8 sides |
equilateral triangle | triangle with all sides the same length |
isosceles triangle | triangle with 2 sides same length and 1 side a different length; think SOS - same-odd man out-same |
scalene triangle | triangle with no sides the same length |
right triangle | triangle with 1 right angle |
acute triangle | triangle with 3 acute angles (less than 90 degrees) |
obtuse triangle | triangle with 1 obtuse angle (greater than 90 degrees |
rhombus | figure with opposite sides parallel and all sides the same length |
trapezoid | a figure with only 1 pair of parallel sides |
parallelogram | a figure with 2 pairs of opposite parallel sides |
rectangle | a figure with 4 right angles and opposite parallel sides |
square | a figure with 4 right angles and 4 sides that are the same length |