Geometry Area, Duplication & Rotation Explorer
Duplicate, drag freely, rotate, mirror flip, draw custom polygons, or slice shapes!
Triangle
Parallelogram
Trapezoid
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Shape Demonstration
Show Dimensions
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Base (b)
Top Base (a)
Height (h)
📋 Shape Duplication Workspace
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Active Base Side:
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Initial Shape:
Triangle (三角形)
Parallelogram (平行四邊形)
Trapezoid (梯形)
General Quadrilateral (一般四邊形)
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Bottom Base (b):
12
Top Base (a):
6
Height (h):
8
Formula & Step Breakdown
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Standard Formula
Area = (Base × Height) ÷ 2
Step 1
Area = (12 × 8) ÷ 2
Step 2
Area = 96 ÷ 2
Result
Area = 48
Visual Explanation:
Every triangle is exactly half of a parallelogram with identical base and height. That's why we divide by 2!