Plane Geometry
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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| Angle | Formed by two rays, or sides, with a common endpoint called the vertex.
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| Acute Angle | The measure of the angle is greater than 0° and less than 90°.
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| Right Angle | The measure of the angle is 90°.
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| Obtuse Angle | The measure of the angle is greater than 90° and less than 180°.
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| Straight Angle | The measure of the angle is 180°.
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| Complementary Angles | Two angles whose measures add to 90°.
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| Supplementary Angles | Two angles whose measures add to 180°.
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| Adjacent Angles | Angles with a common vertex and a common side, but no common interior points.
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| Congruent Angles | Angles that have the same measure.
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| Vertical Angles | Nonadjacent angles formed by two intersecting lines.
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| Parallel Lines | Lines in a plane that never meet.
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| Perpendicular Lines | Lines that intersect at 90° angles.
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| Transversal | A line that intersects two or more lines that lie on the same plane.
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| Triangle Sum Theorem | The theorem that says the angle measures of a triangle add to 180°.
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| Acute Triangle | A triangle with 3 acute angles.
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| Right Angle | A triangle with 1 right angle.
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| Obtuse Triangle | A triangle with 1 obtuse angle.
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| Equilateral Triangle | A triangle with 3 congruent sides and 2 congruent angles.
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| Isosceles Triangle | A triangle with at least 2 congruent sides and 2 congruent angles.
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| Scalene Triangle | A triangle with no congruent sides and no congruent angles.
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| Triangle Inequality Theorem | The theorem states that the sum of any 3 sides of a triangle is greater than the 3rd side.
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| Polygon | A closed plane figure formed by 3 or more segments.
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| Trapezoid | A polygon with exactly 1 pair of parallel sides.
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| Parallelogram | A polygon with 2 pairs of parallel sides.
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| Rectangle | A polygon with 4 right angles.
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| Rhombus | A polygon with 4 congruent sides.
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| Square | A polygon with 4 congruent sides and 4 right angles.
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| Midpoint | The point that divides a segment into 2 congruent segments.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
allvasquez
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