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. On these printable worksheets, students will practice identifying and classifying triangles. 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. An isosceles triangle has two sides (and angles) that are identical. Step 1: Since it is an isosceles triangle it will have two equal angles. An equilateral triangle has sides (and angles) that are all equal. 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. You would also be required to calculate their smallest and largest angles. solve some problems involving angles and sides of triangles The below worksheets deal with identifying the types of triangles, finding their areas, angles, perimeters and sides.classify triangles by length of sides: Equilateral Triangles, Isosceles Triangles, Scalene Triangles.
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