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How many acute angles can a right triangle have?

Answer 1

Two

A right triangle can, and must, have exactly two acute angles. To see this, just remember that the sum of the angles of a triangle must be #180^@#. As a right triangle has one angle equal to #90^@#, this means the sum of the remaining two angles must be #180^@-90^@ = 90^@#. Thus, both of the remaining two angles must have a measure less than #90^@# and therefore must be acute.

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Answer 2

Aaliyah Anderson

A right triangle can have one acute angle.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.