📐 Geometry Practice

Learn about shapes and measurements

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Problem Type

📏

Area

Find the area of shapes

📐

Perimeter

Calculate perimeters

📦

Volume

3D shape volumes

📐

Angles

Find missing angles

Difficulty

Select options above and click "Generate New Problem"

Score: 0/0

📐 2D Shapes - Area & Perimeter

Square

Area = s² Perimeter = 4s

s = side length

Rectangle

Area = l × w Perimeter = 2(l + w)

l = length, w = width

Triangle

Area = ½ × b × h Perimeter = a + b + c

b = base, h = height, a,b,c = sides

Circle

Area = πr² Circumference = 2πr

r = radius, π ≈ 3.14

Parallelogram

Area = b × h Perimeter = 2(a + b)

b = base, h = height

Trapezoid

Area = ½(b₁ + b₂) × h Perimeter = sum of all sides

b₁, b₂ = parallel sides, h = height

📦 3D Shapes - Volume & Surface Area

Cube

Volume = s³ Surface Area = 6s²

s = side length

Rectangular Prism

Volume = l × w × h Surface Area = 2(lw + lh + wh)

l = length, w = width, h = height

Cylinder

Volume = πr²h Surface Area = 2πr² + 2πrh

r = radius, h = height

Sphere

Volume = (4/3)πr³ Surface Area = 4πr²

r = radius

Cone

Volume = (1/3)πr²h Surface Area = πr² + πrl

r = radius, h = height, l = slant height

Pyramid

Volume = (1/3) × Base Area × h

h = height

📐 Angle Rules

Triangle Angles

Sum = 180°

All angles in a triangle add to 180°

Straight Line