Two angles are equal in an isosceles triangle.
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Base angles are equal and so that's 2 pairs of equal angles
There are 3 angles in an isosceles triangle and 2 of them are equal in size. The 3 interior angles add up to 180 degrees.
An isosceles trapezoid has two equal obtuse angles and two equal acute angles that all add up to 360 degrees
2 equal sides and 2 equal angles.
It has to have at least 2 congruent angles and/or sides to be isosceles. Therefore, an equilateral angle would be isosceles.