Quadrilaterals and Polygons Flashcards

1
Q

What is a quadrilateral

A

Any shape with four straight sides.

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2
Q

What is the sum of angles in quadrilateral?

A

360 degrees

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3
Q

Describe a Trapezium

A
  1. One pair of parallel sides.
  2. No line of symmetry (maybe possible)
  3. No rotational symmetry
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4
Q

Describe a parallelogram

A
  1. Two pairs of parallel sides.
  2. Each side is parallel to the opposite side
  3. Opposite angles are equal
  4. Adjacent angles add up to 180 degrees
  5. Rotational symmetry of order 2 (a half turn)
  6. Diagonals bisect each other
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5
Q

Describe a rhombus

A
  1. Special type of parallelogram with four equal sides
  2. Has all the attributes of a parallelogram
  3. Opposite angles are equal
  4. Diagonals bisect each other
  5. Rotational symmetry of order 4
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6
Q

Describe a rectangle

A
  1. Its a parallelogram
  2. Opposite sides are parallel and in equal length.
  3. All angles are right angles
  4. Two lines of symmetry
  5. rotational symmetry of order 2
  6. Lines of symmetry are not at right angles.
  7. Diagonals bisect each other
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7
Q

Describe a square

A
  1. It can be thought of as a special rectangle or rhombus.
  2. All foir sides are equal.
  3. Four lines of symmetry
  4. Rotational symmetry of order 4
  5. Diagonals bisect each other at right angles
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8
Q

What is a polygon?

A

A shape that has straight sides.

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9
Q

How to calculate the sum of the interior angles of a polygon?

A

(n-2) x 180

n=sides

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10
Q

Waht is convex mean.

A

That none of the interior angle are reflex.

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11
Q

What does the exterior angles of a convex polygon add up to?

A

360

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12
Q

What is a regular polygon?

A

All size and angles are equal.

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13
Q

What is the second method of finding the interior angles of a polygon?

A

work out the exterior angle (360 degrees dived by 5)

And then take the answer away from 180.

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14
Q

The sum of an interior and exterior angle of a regular polygon?

A

180 degrees

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15
Q

Describe a kite

A
  1. One line of symmetry
  2. One pair of equal angles
  3. No rotational symmetry
  4. Bisects one way
  5. Diagonals cut each other at right angles
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