A triangle is one of the basic shapes in geometry: a polygon with three corners or vertices and three sides or edges which are line segments. A triangle with vertices A, B, and C is denoted.
-isosceles: two sides are equal in length.
-equilateral: all sides have the same length.
-scalene:all sides are not equal.
-right triangle: A right triangle or right-angled triangle is a triangle in which one angle is a right angle (that is, a 90-degree angle). The relation between the sides and angles of a right triangle is the basis for trigonometry.
-acute triangle:A triangle that has all interior angles measuring less than 90° is an acute triangle or acute-angled triangle.
-obtuse triangle: A triangle that has one interior angle that measures more than 90° is an obtuse triangle or obtuse-angled triangle.
-isosceles: two sides are equal in length.
-equilateral: all sides have the same length.
-scalene:all sides are not equal.
-right triangle: A right triangle or right-angled triangle is a triangle in which one angle is a right angle (that is, a 90-degree angle). The relation between the sides and angles of a right triangle is the basis for trigonometry.
-acute triangle:A triangle that has all interior angles measuring less than 90° is an acute triangle or acute-angled triangle.
-obtuse triangle: A triangle that has one interior angle that measures more than 90° is an obtuse triangle or obtuse-angled triangle.
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