![]() ![]() ∠ B and ∠C are of equal measure.Īpex angle is the angle that is not congruent to the two base angles which are congruent. ![]() The two angles opposite to the equal sides are congruent to each other. The unequal side of an isosceles triangle is called a base. In the above figure, sides AB and AC are of equal length ‘a’ unit. ![]() Two sides of an Isosceles triangle are congruent to each other. In the triangle given below, two sides are of 5inches and one side is 3 inches. In an isosceles triangle, the angles that are opposite to the equal sides are equal. Ī triangle having two sides of equal length is called the Isosceles triangle. Obtuse Angled Triangle: A triangle whose one interior angle is more than 90 0. Right Angled Triangle: A triangle whose one interior angle is 90 0. Scalene Triangl e : A scalene triangle is one whose all three sides are unequal.Ĭlassification of Triangles on the Basis of their Angles is as Follows:Īcute Angled Triangle: A triangle whose all interior angles are less than 90 0. Isosceles Triangle: An isosceles triangle is one whose two sides are equal. Triangles can be classified on the basis of their size as well as angles.Ĭlassification of Triangles on the Basis of their Sides is as Follows:Įquilateral Triangle: An equilateral triangle is one whose all the three sides are equal. A triangle is a three-sided closed 2D shape having three vertices as well as three angles. The line joining any three dots can form a triangle or any three line segments connected to each other end to end also forms a triangle. A single or double line segments together can never form a polygon. The meaning of the word Polygon is a plane figure which has many line segments connected end to end. Triangles are the simplest form of Polygon. It is also important to know that the sum of all the interior angles of a triangle is always 180 degrees. Three line segments connecting the dots are the sides of the triangle, the point of intersection of two lines is known as vertex and the space between them is called an angle. A triangle can be formed by joining any three dots such that the line segments connect each other end to end. A triangle is a closed 2D figure having three sides, three vertices and three angles. ![]()
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