The easiest way to do this is from a standard tetrad sheet in the cell.įold the resulting triangle in half, aligning the sides. For this it is necessary to cut out an isosceles triangle from paper. To understand its practical meaning (or essence), it is necessary to make an auxiliary allowance. The main theorem on which the solution of almost all problems is based is as follows: the height in an isosceles triangle is a bisector and a median. And, of course, the parties, but by this point we will return later. And consequently, all corresponding angles are equal. Recalling the first sign of equality, we can safely conclude that the triangles under consideration are equal. By the condition AB = BC, the side of the AP for the triangles is common, and the angles of the AVD and SVD are equal, because the VA is a bisector. From the angle ABC it is necessary to draw a bisector of the VD. Consider the isosceles triangle ABC shown, for which AB = BC. The theorem says that the angles located at the base of any isosceles triangle are always equal. It is very important to remember that the angle bisector is necessarily a ray, and the bisector of a triangle is part of such a ray. The triangle bisector is a straight line, or rather, a segment of the bisector of the corner, connecting the vertex with the opposite side. The angle bisector is a ray that divides the angle in half. The median is a segment directed from any vertex of the triangle exclusively to the middle of the opposite side. Height is a straight line drawn perpendicular to the opposite side. Consider only those without which our topic will be somewhat incomprehensible. Like any science, geometry has its own basic rules and concepts. The side, the dimensions of which differ, was called the grounds. To make it clearer, what will be discussed next, it is worth remembering the basics of geometry.Ī triangle is isosceles if it has two equal sides. As Plato said, the whole world is based on triangles. Egyptian pyramids, packages with milk, artistic embroidery, northern murals and even patties are all triangles surrounding a person. Forms of buildings often visually resemble them. Architectural structures are based on knowledge of the properties of geometric shapes. This is easy if you know how to find the height in an isosceles triangle. For example, when building a house with a high roof, you need to calculate the thickness of the logs and their number. It is also knowledge that is often required in life. Geometry is not only an object in the school, on which you need to get an excellent assessment.
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