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Grade 5 Geometry
Angles and Polygons; Terms
Question | Answer |
---|---|
Point | Exact position or location on a plane or line |
Line | No beginning or end point |
Ray | Straight line that begins at a certain point and extends forever in one direction |
Line Segment | A part of a straight line that does not extend forever but has two distinct endpoints |
Right angle | Exactly 90 degrees |
Acute angle | Less than 90 degrees |
Obtuse angle | Between 90 and 180 degrees |
Straight angle | Exactly 180 degrees |
Vertical angles | Opposite angles formed by the intersection of two lines |
Congruent angles | Angles with the same measure |
Complementary angles | Sum of angles is 90 degrees |
Supplementary angles | Sum of angles is 180 degrees |
Acute triangle | A triangle that has all acute angles |
Right triangle | A triangle that has one right angle |
Obtuse triangle | A triangle that has one obtuse angle |
Scalene triangle | A triangle with no congruent sides |
Isosceles triangle | A triangle with at least 2 congruent sides |
Equilateral triangle | A triangle with all sides congruent |
Quadrilateral | A figure with four sides and four angles |
Similar figures | Figures that have the same shape but not the same size |
Congruent figures | Figures that have the same size and shape |