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4th Grade Geometry
Geometry Terms _Kay's mom
Term | Definition |
---|---|
intersecting lines | lines that cross at exactly one point |
parallel lines | lines that are always the same distance apart and never intersect |
perpendicular lines | lines that intersect that and form 4 right angles |
point | an exact location in a space |
line | a straight path made up points that go on forever in both directions |
line segment | part of a line with 2 endpoints |
ray | a part of a line that has one end point and continues forever in one direction |
angle | formed by 2 rays or 2 line sigments that have the same endpoint |
acute angle | an angle with less than 90' |
right angle | an angle with exactly 90' |
obtuse angle | an angle with more that 90' |
acute triangle | a triangle with 3 acute angles |
obtuse triangle | a triangle with 1 obtuse angle |
right triangle | a triangle with 1 right angle |
quadrilateral | a polygon with 4 sides and 4 angles |
square | 4 sides of equal length, 2 pairs of parallel sides, 4 right angles |
rectangle | 2 pairs of parallel sides opposite sides are equal 4 right triangle |
rhombus | 4 sides of equal length 2 pairs of parallel sides |
parallelogram | 2 pairs of equal length 2 pair pf parallel sides |
trapezoid | 1 pair of parallel sides |
line of symmetry | divides a shape into two parts that are the same size and shape. |