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One dimension means you only need to measure once. A line is a good example. It has only one measure - length. ■
No because Similar figures are the same shape, angles, and types but not lengths. Congruent means EXACTLY the same in everything.
Congruent means that two figures have the same shape. Non-congruent means they don't. There is no "similarity"; two non-congruent figures can be just about anything, for example a square and a circle.
visualizing solid shapes means 3 dimensional or 3D figures