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An isosceles triangle only requires that two of its inside angles be equal to eachother. Therefore, a right angle triangle (90 degree inside angle) with two 45 degree inside angles on the the two other corners would be considered an isoceles triangle. However, this would be the ONLY right angle triangle that would be considered an isoceles triangle since all inside angles must add up to 180 (90+45+45=180).
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Are some isosceles triangles equilateral triangles?
All isosceles triangles are not equilateral triangles
Is a triangle a symmetric shape yes or no?
Some triangles are symmetric, while others are not. All equilateral and isosceles triangles are symmetric.all triangles are symmetric.
Does an acute triangle have two congruent sides?
Not every acute triangle has two congruent sides, although some do, in which case they are called isosceles triangles.
What are some methods that can prove triangles congruent?
SSS - Side-Side-SideAll three corresponding sides of the triangles have the same length AAS - Angle-Angle-Side; ASA - Angle-Side-AngleTwo corresponding angles are equal and a corresponding side is equal SAS - Side-Angle-SideTwo corresponding sides have the same length and the enclosed angle is the same. Note: it is important that the angle is the one between the corresponding sides of equal length.RHS - Right_angle-Hypotenuse-SideIn a right angled triangle the hypotenuse and a corresponding side must be equal.
Are some right triangles also the same as equilateral triangles?
No...
