![]() ![]() Right trapezoid Obtuse trapezoidĪn obtuse trapezoid has one interior angle (created by either base and a leg) greater than 90°. Isosceles trapezoid Right trapezoidĪ right trapezoid has one right angle (90°) between either base and a leg. The bases are parallel but of different lengths. Scalene trapezoid Isosceles trapezoidĪn isosceles trapezoid has legs of equal length. Obtuse trapezoid – Like an obtuse triangleĪ scalene trapezoid has four sides of unequal length. Right trapezoid – Once was a right triangle Isosceles trapezoid – Began as an isosceles triangle Scalene trapezoid – Started out as a scalene triangle Since trapezoids can begin life as triangles, they share names derived from the kinds of triangles: The base is usually the longer parallel side, but if the trapezoid is drawn with the shorter parallel side at the bottom, then it is the base. A trapezoid can be drawn or pictured with either leg at the bottom, or with the shorter parallel side at the bottom.īecause the parallel sides are the only ones that can be bases, even when the trapezoid is drawn with a leg at the bottom and horizontal, it is not a base. ![]() Be prepared, though, to see trapezoids in any orientation. Usually, to be as clear as possible, pictures and drawings of trapezoids show the two parallel sides running horizontally, with the longer side down as the base. You can draw a perpendicular line anywhere along the base of the trapezoid, and when it touches the opposite, parallel side, its length is the altitude.Īnother identifying property of all trapezoids is that any two adjacent interior angles will be supplementary (add to 180°). Altitude is always measured from the base (either parallel side) to the other side, at a right angle to the base. Do not be fooled by the sloping legs - if they slope, they are longer than the height. ![]() The altitude of a trapezoid is its height. The last two pieces you drew or put down (at the left and right ends) are called the trapezoid's legs. There you have it, a trapezoid! The horizontal parts are the bases. Put the other two objects on the left and right of these two, or draw them in, so all eight endpoints touch. Lay two of the objects down, or draw two line segments, so they are parallel (equidistant). The four straight (linear) objects can be four different lengths, or three different lengths (two of them could be the same). Use anything you like: uncooked spaghetti, pencils, lollipop sticks whatever you have handy. You can also make a trapezoid from four line segments, or four straight objects. We already know a trapezoid is like the bottom part of a triangle if you cut off a smaller triangle from it. Trapezoid definition Trapezoid definitions Because the definition only requires one pair of parallel sides, the other two sides can be arranged in many ways, creating four interior angles that will always add up to 360°. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |