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Do the base angles in an isosceles right triangle always measure 45°45°?


a.) Yes, the base angles of any isosceles triangle are congruent and supplementary, so their measures must be 45°45°.

b.) yes, the base angles of a right isosceles triangle are congruent and complementary, so their measures must be (fraction) 90°/2 = 45°

c.) No, the base angles of a right isosceles triangle are not always congruent.

d.) No, the base angles of a right isosceles triangle are congruent, but they can both equal 90°90°.