PARALLELOGRAM

параллелограмм - circumscribed parallelogram - curvilinear parallelogram - degenerate parallelogram - fundamental parallelogram - law of parallelogram - null parallelogram - parallelogram disk - parallelogram element - parallelogram identity - parallelogram law - parallelogram of accelerations - parallelogram of forces - parallelogram of periods - parallelogram of velocities - parallelogram rule - reduced parallelogram - rule of parallelogram - spherical parallelogram