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GRE Math: Quadrilaterals And Other Polygons

Subjects : gre, math

Instructions:

Answer 10 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. facts about parallelograms
(n-2)180
Opposite angles are equal - consecutive angles are supplementary - opposite sides are equal - diagonals bisect each other - area= b*h - perimenter = 2b + 2c
Equilateral parallelogram - opposite angles are equal - all sides are equal - diagonals are perpendicular to each other - perimeter=4s - area =b*h= half the product of the diagonals
All sides are equal - all angles are 90 - both diagonals bisect each other at 90 - each diagonal is ssqrt2 - area = s^2

2. polygons: sum of all interior angles
2 pairs of adjacent congruent sides - the diagonals are perpendicular to each other - the longer diagonal bisects the shorter - the longer diagoanl bisects the two angles whose vertices are its endpoints
Equilateral parallelogram - opposite angles are equal - all sides are equal - diagonals are perpendicular to each other - perimeter=4s - area =b*h= half the product of the diagonals
(n-2)180
quadrilateral with parallel opposite sides

3. trapezoid
Equilateral parallelogram - opposite angles are equal - all sides are equal - diagonals are perpendicular to each other - perimeter=4s - area =b*h= half the product of the diagonals
2 pairs of adjacent congruent sides - the diagonals are perpendicular to each other - the longer diagonal bisects the shorter - the longer diagoanl bisects the two angles whose vertices are its endpoints
quadrilateral with one pair of parallel sides - parallel sides are bases - heights are equal - legs may or may no be equal (=isosceles trapezoid) - diagonals may or may not be equal - area = .5h(b1+b2)
360

4. polygons: sum of all exterior angles
(n-2)180
All sides are equal - all angles are 90 - both diagonals bisect each other at 90 - each diagonal is ssqrt2 - area = s^2
Opposite angles are equal - consecutive angles are supplementary - opposite sides are equal - diagonals bisect each other - area= b*h - perimenter = 2b + 2c
360

5. rectangle
quadrilateral with parallel opposite sides
Equilateral parallelogram - opposite angles are equal - all sides are equal - diagonals are perpendicular to each other - perimeter=4s - area =b*h= half the product of the diagonals
Parallelograms with right angles - all angles are 90 - diagonals are equal (not perpendicular) - perimeter = 2b+2a - area = a*b
All sides are equal - all angles are 90 - both diagonals bisect each other at 90 - each diagonal is ssqrt2 - area = s^2

6. parallelogram
Equilateral parallelogram - opposite angles are equal - all sides are equal - diagonals are perpendicular to each other - perimeter=4s - area =b*h= half the product of the diagonals
All sides are equal - all angles are 90 - both diagonals bisect each other at 90 - each diagonal is ssqrt2 - area = s^2
(n-2)180
quadrilateral with parallel opposite sides

7. square
quadrilateral with one pair of parallel sides - parallel sides are bases - heights are equal - legs may or may no be equal (=isosceles trapezoid) - diagonals may or may not be equal - area = .5h(b1+b2)
All sides are equal - all angles are 90 - both diagonals bisect each other at 90 - each diagonal is ssqrt2 - area = s^2
quadrilateral with parallel opposite sides
Opposite angles are equal - consecutive angles are supplementary - opposite sides are equal - diagonals bisect each other - area= b*h - perimenter = 2b + 2c

8. kite
Opposite angles are equal - consecutive angles are supplementary - opposite sides are equal - diagonals bisect each other - area= b*h - perimenter = 2b + 2c
2 pairs of adjacent congruent sides - the diagonals are perpendicular to each other - the longer diagonal bisects the shorter - the longer diagoanl bisects the two angles whose vertices are its endpoints
360
(n*(n-3)/2 where n>=3

9. polygons: number of diagonals is
Opposite angles are equal - consecutive angles are supplementary - opposite sides are equal - diagonals bisect each other - area= b*h - perimenter = 2b + 2c
Parallelograms with right angles - all angles are 90 - diagonals are equal (not perpendicular) - perimeter = 2b+2a - area = a*b
(n*(n-3)/2 where n>=3
2 pairs of adjacent congruent sides - the diagonals are perpendicular to each other - the longer diagonal bisects the shorter - the longer diagoanl bisects the two angles whose vertices are its endpoints

10. rhombus
Equilateral parallelogram - opposite angles are equal - all sides are equal - diagonals are perpendicular to each other - perimeter=4s - area =b*h= half the product of the diagonals
Opposite angles are equal - consecutive angles are supplementary - opposite sides are equal - diagonals bisect each other - area= b*h - perimenter = 2b + 2c
Parallelograms with right angles - all angles are 90 - diagonals are equal (not perpendicular) - perimeter = 2b+2a - area = a*b
360

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GRE Math: Quadrilaterals And Other Polygons

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