Defenitions
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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| triangle | a polygon with three sides
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| scalene | No congruent sides
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| isosceles | At least 2 congruent sides
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| equilateral | 3 congruent sides
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| acute | 3 acute angles
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| right | 1 right angle
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| obtuse | 1 obtuse angle
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| equilangular | 3 congruent angles
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| interior angles | The original angles
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| exterior angles | The angles that form linear pairs with the interior angles
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| corollary to a theorem | a statement that can be proved easily using the theorem. The corollary below follows from the Triangle Sum Theorem
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| congruent figures | Two geometric figures are congruent if they have exactly the same size and shape.
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| corresponding parts | all the parts of one figure are congruent to the corresponding parts of the other figure
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| right triangle | 1 right angle
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| legs | In a right triangle, the sides adjacent to the right angle are called the legs
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| hypotenuse | The side opposite the right angle is called the hypotenuse of the right triangle
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| flow proof | A flow proof uses arrows to show the flow of a logical argument
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| isosceles triangle | At least 2 congruent sides
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| legs | When an isosceles triangle has exactly two congruent sides, these two sides are the legs
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| vertex angle | The angle formed by the legs
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| base | The third side is the base of the isosceles triangle.
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| base angles | The two angles adjacent to the base
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| transformation | an operation that moves or changes a geometric figure in some way to produce a new figure.
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| image | The new figure is called the image
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| congruence transformation | A congruence transformation changes the position of the figure without changing its size or shape.
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| translation | A translation moves every point of a figure the same distance in the same direction
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| reflection | A reflection uses a line of reflection to create a mirror image of the original figure
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| rotation | A rotation turns a figure about a fixed point, called the center of rotation
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Created by:
NuttyBaseball
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