Irregular shapes are those with sides of different lengths and angles that are unequal. Regular shapes have sides with equal lengths and have angles of the same size.
Continue ReadingShapes like squares and equilateral triangles are considered regular shapes because they have predictably identical sides and angles. If a person were to take an equilateral triangle and make each of the sides different lengths and change the size of each angle, the regular-shaped triangle would turn into an irregular shape. Irregular shapes do not have to look messy or weird, though; a shape that resembles a rectangle with a chunk cut out of it can be considered irregular, even though it is composed of straight lines and has a neat and orderly appearance.
Learn more about ShapesThe angles that lie on the exterior of the intersection created on opposite sides of a paired set of intersecting lines are alternate exterior angles. If the two intersecting lines are parallel, the alternate exterior angles are congruent.
Full Answer >Three laws can be used to find the sides and angles of almost any triangle: the Law of Angles, the Law of Sines, and the Law of Cosines. The Law of Angles means that all three angles of a triangle add up to 180 degrees. The Law of Sines is that the ratio of each side to the sine of its opposite angle is equal: a/sin(A) = b/sin(B) = c/sin(C). The Law of Cosines works when all sides are known.
Full Answer >A square is always a rhombus because it satisfies the definition of a rhombus, which is any figure with four equal sides, equal opposite angles and two pairs of parallel lines. A rhombus can sometimes be a square.
Full Answer >A polygon with four sides and four angles is called a quadrilateral. Quadrilaterals are two-dimensional, closed shapes with angle measurements that add up to 360 degrees.
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