Pre Algebra Honors Formulas Flashcards

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Questions and Answers

What is the formula for the area of a parallelogram?

  • A = bh (correct)
  • A = pi(r^2)
  • A = 1/2bh
  • A = 1/2 (h) (b1 + b2)

What is the formula for the area of a triangle?

A = 1/2bh

What is the formula for the area of a trapezoid?

A = 1/2 (h) (b1 + b2)

What is the formula for the area of a circle?

<p>A = pi(r^2)</p> Signup and view all the answers

What is the formula for the circumference of a circle?

<p>C = d(pi)</p> Signup and view all the answers

Flashcards

Parallelogram Area

Area = base × height

Triangle Area

Area = 1/2 × base × height

Trapezoid Area

Area = 1/2 × height × (base1 + base2)

Circle Area

Area = π × radius × radius

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Circle Circumference

Circumference = diameter × π

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Study Notes

Area Formulas

  • Parallelogram Area Formula:

    • Calculated using ( A = bh )
    • ( b ) represents the base, and ( h ) the height.

  • Triangle Area Formula:

    • Given by ( A = \frac{1}{2}bh )
    • The base ( b ) is multiplied by the height ( h ), then halved.

  • Trapezoid Area Formula:

    • Expressed as ( A = \frac{1}{2}(h)(b1 + b2) )
    • ( h ) is the height, while ( b1 ) and ( b2 ) are the lengths of the two bases.

  • Circle Area Formula:

    • Defined by ( A = \pi(r^2) )
    • ( r ) indicates the radius of the circle.

Circumference Formula

  • Circle Circumference Formula:
    • Represented by ( C = d(\pi) )
    • ( d ) denotes the diameter of the circle, which is multiplied by ( \pi ).

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