2D and 3D Shapes and Formulas

Flashcards covering formulas for 2D and 3D shapes, including area, perimeter, surface area, circumference and volume.

Square Perimeter

P = 4l, where l is the side length

Square Area

A = l^2, where l is the side length

Rectangle Perimeter

P = 2l + 2w, where l is length and w is width

Rectangle Area

A = l x w, where l is length and w is width

Cuboid Surface Area

SA = 2(ab + bc + ac), where a, b, and c are the side lengths

Triangular Prism Surface Area

SA = (a + b + c)l + 2bh, where a, b, c are triangle side lengths, l is the prism length, and h is the triangle height

Prism Volume

V = (area of cross section) x length

Parallelogram Area

A = b x h, where b is the base and h is the height

Trapezoid Area

A = ((a + b) / 2) x h, where a and b are the parallel sides and h is the height

Circle Diameter

d = 2r, where r is the radius

Circle Circumference

C = 2πr, where r is the radius

Circle Area

A = πr^2, where r is the radius

Semicircle Area

A = (πr^2) / 2, where r is the radius

Semicircle Perimeter

P = (1/2)C + d, where C is the circumference and d is the diameter

Radius (r)

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

Diameter (d)

The distance across a circle through its center; twice the radius.