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Two lines that will never intersect. 2 Dimensional Figures The two shorter sides of a triangle must add up to be longer than the longest side. Similar figures 1. Corresponding (matching) sides are proportional. (You multiply all sides of one figure by the same number to get the length of the sides of its similar figure.) 2. Corresponding (matching) angles are congruent (same). Scale factor is the number that you multiply (dilate) one figure by to get the measurements of its similar figure. The scale factor of the perimeter (side lengths) SQUARED is the scale factor of the area of similar figures. Area Area of Irregular Figures Circles km km 2 43.96 km 706.5 km² Solid Figure – 3 Dimensional Figure All side faces are rectangles. All side faces are triangles. Cross Section – the 2d shape you see when you slice a 3d figure. : circle : triangle : rectangle : triangle : circle : triangle : rectangle :rectangle
