area of 2d figures

Front

What is the formula for the area of a rectangle?

Back

Area = length × width

Front

What is the area of a triangle?

Back

Area = 1/2 × base × height

Front

Define a parallelogram.

Back

A parallelogram is a four-sided figure (quadrilateral) with opposite sides that are parallel and equal in length.

Front

What is the formula for the area of a parallelogram?

Back

Area = base × height

Front

What is a trapezoid?

Back

A trapezoid is a four-sided figure (quadrilateral) with at least one pair of parallel sides.

Front

What is the formula for the area of a trapezoid?

Back

Area = 1/2 × (base1 + base2) × height

Front

What is the circumference of a circle?

Back

Circumference = 2 × π × radius or Circumference = π × diameter

Front

What is the formula for the area of a circle?

Back

Area = π × radius²

Front

Define diameter in relation to a circle.

Back

The diameter is a straight line passing from side to side through the center of a circle, equal to twice the radius.

Front

Define radius in relation to a circle.

Back

The radius is the distance from the center of the circle to any point on its circumference.