Calculadora de Geometría

import math

def circle_area(r: float) -> float:
    return math.pi * r ** 2

def circle_circumference(r: float) -> float:
    return 2 * math.pi * r

def rectangle_area(l: float, w: float) -> float:
    return l * w

def rectangle_perimeter(l: float, w: float) -> float:
    return 2 * (l + w)

def triangle_area(base: float, height: float) -> float:
    return 0.5 * base * height

def triangle_area_heron(a: float, b: float, c: float) -> float:
    s = (a + b + c) / 2
    return math.sqrt(s * (s - a) * (s - b) * (s - c))

def sphere_volume(r: float) -> float:
    return (4 / 3) * math.pi * r ** 3

def sphere_surface(r: float) -> float:
    return 4 * math.pi * r ** 2

def cylinder_volume(r: float, h: float) -> float:
    return math.pi * r ** 2 * h

# Examples
print(f"Circle area r=5: {circle_area(5):.4f}")          # 78.5398
print(f"Sphere volume r=3: {sphere_volume(3):.4f}")       # 113.0973
print(f"Triangle (Heron) 3,4,5: {triangle_area_heron(3,4,5):.4f}")  # 6.0000