Geometric Formulas

A set of flashcards covering key geometric formulas and concepts.

Square Perimeter

P = 4s

Square Area

A = s²

Rectangle Perimeter

P = 2l + 2w

Rectangle Area

A = l × w

Triangle Perimeter

P = a + b + c

Triangle Area

A = ½ bh

Pythagorean Theorem

a² + b² = c², used to find side lengths of right triangles.

Trapezoid Perimeter

P = a + b₁ + b₂ + c

Trapezoid Area

A = ½ h(b₁ + b₂)

Parallelogram Perimeter

P = 2a + 2b

Parallelogram Area

A = b × h

Right Triangle Area

A = ½ ab

Isosceles Triangle

Has two equal sides and two equal angles.

Cube Volume

V = s³

Cube Surface Area

SA = 6s²

Rectangular Solid Volume

V = L × W × H

Rectangular Solid Surface Area

SA = 2lw + 2hw + 2lh

Equilateral Triangle

Has three equal sides and each angle measures 60°.

Sum of Angles of a Triangle

The sum equals 180°.

Circle Circumference

c = πd or c = 2πr

Circle Area

A = πr²

Sphere Volume

V = (4/3) πr³

Sphere Surface Area

SA = 4πr²

Cylinder Volume

V = πr²h

Cylinder Surface Area

SA = 2πr(r + h)

Cone Volume

V = (1/3) πr²h

Cone Surface Area

SA = πrs + πr²