Calculate the area of various geometric shapes including circle, triangle, rectangle, and parallelogram. Perfect for students, teachers, and professionals.
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Calculate the area of a circle using radius, diameter, or circumference. Uses π = 3.14159 for calculations.
Calculate area using base and height, or using three sides (Heron's formula).
Calculate area, perimeter, and diagonal of a rectangle using length and width.
Calculate area and perimeter of a parallelogram using base, height, and side length.