front 1 point | back 1 an exact location in space |
front 2 acute angle | back 2 an angle that is less than 90 degrees and smaller than a right angle |
front 3 Hexagon | back 3 a polygon with 6 sides and 6 vertices |
front 4 intersecting lines | back 4 the 2 line segments cross each other at a point |
front 5 parallel lines | back 5 lines that are equal distance apart at every point and they never intersect
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front 6 symmetric
| back 6 a figure is symmetric if it can be folded into 2 congruent halves that fit on top of each other. The line of symmetry divides the valentine heart into 2 congruent shapes. |
front 7 line | back 7 a straight path of points that goes on forever in both directions |
front 8 plane | back 8 an endless flat surface |
front 9 perpendicular lines | back 9 2 lines that intersect at a right angle |
front 10 line segment | back 10 part of a line that has 2 end points |
front 11 ray | back 11 part of a line that has 1 end point and extends forever in one direction |
front 12 angle | back 12 a figure formed by 2 rays that have the same endpoint |
front 13 right angle | back 13 an angle that measures exactly 90º |
front 14 obtuse angle | back 14 and angle that measures more than 90º |
front 15 straight angle | back 15 an angle that measures exactly 180º |
front 16 polygon | back 16 a closed shape made up of line segments |
front 17 side | back 17 each of the line segments of a polygon |
front 18 vertex, vertices | back 18 the point where 2 rays meet to form an angle. the points where the sides of a polygon meet. |
front 19 triangle | back 19 a polygon with 3 sides and 3 angles |
front 20 quadrilateral | back 20 a polygon with 4 sides and 4 angles |
front 21 pentagon | back 21 a polygon with 5 sides and 5 angles |
front 22 octagon | back 22 a polygon with 8 sides and 8 angles |
front 23 parallelogram | back 23 a quadrilateral in which the opposite sides are parallel |
front 24 rectangle | back 24 a parallelogram with 4 right angles |
front 25 square | back 25 a parallelogram with 4 right angles and all sides the same length |
front 26 rhombus | back 26 a parallelogram with all sides the same length |
front 27 trapezoid | back 27 a quadrilateral with only 1 pair of opposite sides that are parallel |
front 28 equilateral triangle | back 28 a triangle with 3 equal sides |
front 29 isosceles triangle | back 29 a triangle that has 2 equal sides |
front 30 scalene triangle | back 30 a triangle that has no sides that as the same length |
front 31 right triangle | back 31 a triangle with 1 right angle |
front 32 acute triangle | back 32 a triangle with 3 acute angles |
front 33 obtuse triangle | back 33 a triangle with one obtuse angle |
front 34 congruent | back 34 2 shapes that are the same shape and the same size |
front 35 similar | back 35 2 shapes that are the same shape but not the same size |
front 36 classify | back 36 To arrange in groups, by some property.
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front 37 ellipse | back 37 a 2 dimensional shape that resembles a flatten circle
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front 38 equiangular | back 38 |
front 39 two dimensional | back 39 a shape that has height and width but no depth, Squares, Circles, Triangles, etc are two dimensional objects |
front 40 congruent polygons | back 40 2 polygons that are the same shape and same size |