Area of 2D figures

Front

What is the formula for the area of a rectangle?

Back

A = l × w, where l is the length and w is the width.

Front

What is the formula for the area of a triangle?

Back

A = 1/2 × b × h, where b is the base and h is the height.

Front

What is the formula for the area of a circle?

Back

A = πr², where r is the radius.

Front

What is the formula for the area of a trapezoid?

Back

A = 1/2 × (b₁ + b₂) × h, where b₁ and b₂ are the lengths of the two bases and h is the height.

Front

What does 'radius' mean in relation to a circle?

Back

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

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.

Front

What is the definition of 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

A = b × h, where b is the base and h is the height.

Front

What is the definition of a square?

Back

A square is a quadrilateral with all four sides of equal length and all angles equal to 90 degrees.

Front

What is the formula for the area of a square?

Back

A = s², where s is the length of a side.