Parallelogram
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More in Geometry
- Angle sum of a triangle
- Pythagorean theorem
- Area of a triangle
- Heron's formula
- Law of sines
- Law of cosines
- Length of a median
- Triangle midsegment theorem
- Inscribed circle
- Circumscribed circle
- Rectangle
- Square
- Rhombus
- Trapezoid
- Circumference and area of a circle
- Arc length and sector area
- Inscribed angle theorem
- Tangent to a circle
- Regular polygon
- Angles of a polygon
- Intersecting chords theorem
- Parallel lines cut by a transversal
- Similar triangles