No but its apex angle can be a right angle with 2 equal base angles of 45 degrees
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The base angles of an isosceles triangle are congruent. The vertex angle of an isosceles triangle is not necessarily congruent to the base angles.
It usually is a right angle that represents an isosceles triangle but there are some cases that the right and left side are equal and the base is the one with an unequal length.
Yes and it will have a 90 degree angle and two angles of 45 degrees. Such a triangle is called an isosceles right angle triangle.
90 degrees. This is an isosceles right triangle, standing on its hypotenuse.
Because it has 2 equal base angles and 2 equal sides It is the only triangle that is both an isosceles and right angle triangle