Anles, lines, triangles
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Point | a bold dot
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| Line | keeps going without in two opposite directions.
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| Angle | formed by two rays with the same end point
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| Ray | has on end with a point and the other keeps going in one direction.
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| Plane | a flat surface that extends without end in all directions.
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| Vertex | The end point of two lines
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| Straight angle | measures 180°
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| Right angle | measures 90° and has a little box
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| Supplementary | if the sum of theirs measures 180°
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| Complementary | The sum of theirs measures 90°
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| Vertical angle | there pairs are called vertical angles, and they always have the same measure. OPPOSITE PAIRS
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| Paralled Lines | two lines that do not intersect. SAME PLANE
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| Perpendicular lines | two lines that intersect at a right angle.
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| Corresponding angles | angles that occupliy corresponging positions when a line intersects with two other lines
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| alternate interior angles | insider angles
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| alternate exterior angle | outside angles
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| Quadrilateral | a closed figure with four sides that are line segments
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| Trapezoid | quadrilateral with exactly one pair of parallel sides
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| Parallelogram | quadrilateral with both pairs of opposite sides parallel.
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| Rhombus | parallelogram with 4 sides of equal length.
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| Rectangle | parallelogram with 4 right angles
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| Square | parallelogram with 4 sides of equal lenth and 4 right angles.
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| Acute angle | measure is less then 90°
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| Right angle | measure is exactly 90°
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| obtuse angle | measure is greater then 90° and less then 180°
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| acute triangle | has 3 acute angles
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| Right Triangle | has one right angle
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| Obtuse Triangle | has on obtuse angle
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| Equilateral Triangle | has 3 sides of equal lenth
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| isosceles Triangle | has 2 of the same side lengths
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| Scale Triangle | has NO sides of the same length.
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