Properties of Shapes Flashcards

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1
Q

Sum of angles in a quadrilateral

A

360 degrees

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2
Q

“Big Four” Parallelogram Properties

A
  • Parallel opposite sides
  • Equal opposite sides
  • Equal opposite angles
  • Diagonals bisect each other
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3
Q

Rhombus Properties

A
  • Four equal sides
  • Diagonals intersect perpendicularly
  • “Big Four”
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4
Q

Rectangle Properties

A
  • All 90 degree angles
  • Diagonals are equal in length
  • “Big Four”
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5
Q

Square Properties

A

All properties of rhombuses and rectangles combined:

  • Four equal sides
  • Diagonals intersect perpendicularly
  • All 90 degree angles
  • Diagonals are equal in length
  • “Big Four”
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6
Q

Trapezoid Properties

A
  • Exactly one pair of parallel sides

Symmetrical trapezoid: equal legs, equal angles on both sides, equal diagonals

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7
Q

Three Pythagorean Triplets

A

3, 4, 5
5, 12, 13
8, 15, 17

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8
Q

Sum of Angles in an n-sided Polygon

A

(n–2) * 180

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9
Q

Sides of a 45-45-90 Triangle

A

1, 1, root 2

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10
Q

Sides of a 30-60-90 Triangle

A

1, root 3, 2

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11
Q

Area of a Square

A

A = s^2

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12
Q

Area of a Quadrilateral

A

A = bh

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13
Q

Area of a Trapezoid

A

A = average of two bases * height

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14
Q

Circumference of a Circle

A
C = pi * d
C = pi * 2r
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15
Q

Area of a Circle

A

A = pi * r^2

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