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27 Cards in this Set
- Front
- Back
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>
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Greater than
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<
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less than
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=
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equal to
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What makes a rhombus a rhombus?
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First 3 make it different from other parallelograms
a. diagonals are perpendicular b. ALL sides congruent c. diagonals bisect opposite angles The following true for all parallelograms d. diagonals bisect each other e. two pairs of parallel sides f. consecutive angles are supplementary |
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What makes a rectangle a rectangle?
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First 2 make it different from other parallelograms
a. diagonals are congruent b. all angles are congruent (=90 degrees) The following true for all parallelograms d. diagonals bisect each other e. two pairs of parallel sides f. consecutive angles are supplementary g. both pairs of opposite sides are congruent |
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What makes a square a square?
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First 4 makes it different from other parallelograms
a. diagonals are perpendicular b. ALL sides congruent c. All angles are congruent d. Diagonals are congruent e. Diagonals bisect opposite angles The following true for all parallelograms f. diagonals bisect each other g. two pairs of parallel sides h. consecutive angles are supplementary |
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What's are the properties of a parallelogram?
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a. diagonals bisect each other
b. two pairs of parallel sides c. consecutive angles are supplementary d. opposite sides congruent e. opposite angles congruent |
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Quadrilateral
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Has 4 sides and the sum of all 4 angles is 360 degrees.
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Sum of the interior angles of a triangle
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180 degrees
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Congruent angles
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Angles with the same measurement
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Acute Triangle
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Triangle with 3 angles less than 90 degrees
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Right Triangle
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Triangle with one 90 degree angle
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Obtuse triangle
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Triangle with one obtuse angle
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Equiangular Triangle
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A triangle with 3 angles congruent (each meases 60 degrees)
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Type of angles formed when lines intersect.
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Vertical angles
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What the congruent sides of an isosceles triangle are called.
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legs
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What the non-congruent side of an isosceles triangle is called.
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The base
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What do we know about the base angles of an isosceles triangle?
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They are congruent and opposite the legs (the congruent sides)
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What type of triangle has the following angles?
50°, 100°, 30° |
obtuse scalene triangle
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What type of triangle has the following angles?
60°, 60°, 60° |
Equiangular Equilateral triangle
(Acute equilateral triangle is also acceptable) |
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What type of triangle has the following angles?
40°, 100°, 40° |
Obtuse Isosceles Triangle
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What makes a kite a kite?
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a. Has 4 sides
b. Diagonals are perpendicular c. both pairs of adjacent sides are congruent. d. 1 pair of opposite angles are supplementary. e. NO parallel sides |
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What makes a trapezoid a trapezoid?
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a. exactly one pair of parallel sides
b. Parallel sides ARE NOT congruent. c. 2 sets of consecutive angles are supplementary d. non parallel sides called legs e. parallel sides called bases |
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What makes an isosceles trapezoid?
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a. everything that makes a trapezoid a trapezoid.
b. diagonals are congruent. c. Base angles are congruent d. legs are congruent. |
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What are the three undefined terms in geometry?
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point line and plane
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Why are the 3 undefined terms considered undefined?
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Because the definitions are circular, it really isn't possilbe to define them without using the words in the definitions.
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point
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has no size, but can be represented by a dot
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