4.4 parallel lines and triangles
. ParallelParallel mean line since the two lines up with the distance between the line rate forever no matter how long it towards the end of the drag out will not meet. The curve is also called parallel, parallel curve
.Two lines are parallel to each other when both linear distance is always the same, and use the symbols "/ /" instead of a straight line, parallel รล parallel with a straight line. Because the distance equal facilities. Prove that line both have equal distance.
step 1 plot points on a straight line at least any one 2 position. By the end of the position is quite route left and right at each position
step 2 do right angle at the given point
step 3 line angle
.Step 3 used measuring ruler line drawn angles. That have the same length. If only to show that the two straight lines parallel
triangle (English:Triangle) is one of the basic shapes of geometry, polygons, which are 3 corners or vertices and 3 sides or edges are line segments a triangle with vertices A B, and C, denoted by ABC
.In geometry Euclid points 3 any point That is not in the same line. Will be able to create a triangle has only one. And the image on the single plane (such as two-dimensional space)
.Perpendicular bisector (perpendicular bisector) is the line drawn through the midpoint of the side and perpendicular to that side, that is, do right angle to the side. Perpendicular bisector of the three will meet at a single point, is the breakout (Circumcenter).This point is the center of a circle surrounded (circumcircle). Which is a circle that dragged through the top three. Diameter of the circle can be found from the rules as said above
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.The theorem of Thales (Thales' theorem) said that if the central circle on one side of the triangle. The opposite angle that is at a right angle. In addition, if the breakout in the triangle.If the center circle outside the triangle. The triangle is a obtuse triangle
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the intersection of height point Orthocentre
.Height (altitude) of a triangle is a line drawn through points peak and perpendicular (right angle) to the opposite side. The opposite side is called the base (base) of height and height point cut with the base (or extension) is called the foot.
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