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Therefore, an equilateral triangle is also an equiangular triangle.Īn equilateral triangle can be considered a special case of isosceles triangle, having all three sides equal. Its three angles are also equal and they are each 60º. The sizes of the other two angles are 42° each.Īn equilateral triangle has all three sides equal in length. The sum of all the angles in any triangle is 180°. Step 2: Let x be one of the two equal angles. The given 96º angle cannot be one of the equal pair because a triangle cannot have two obtuse angles. Step 1: Since it is an isosceles triangle it will have two equal angles. What are the sizes of the other two angles? These two angles are called the base angles.Īn isosceles triangle has one angle of 96º. The angles opposite the equal sides are also equal. One way to classify triangles is by the length of their sides.Īn isosceles triangle has two sides of equal length. Triangles are polygons that have three sides, three vertices and three angles. One activity is a printable of a cut and paste worksheet with pictures of triangles to be sorted and glued into the correct columns. Understand Triangles 24 5 How to Triangles Named by the Length of Their Sides A C O M N B 14 14 4 4 14. This resource includes two activities to practice classifying triangles as equilateral, right, isosceles, or scalene. Because there are no equal sides, there are no equal angles. solve some problems involving angles and sides of triangles Scalene Triangle A scalene triangle is a triangle with no equal sides. classify triangles by length of sides: Equilateral Triangles, Isosceles Triangles, Scalene Triangles.
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