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Q: Why do you know that a right triangle has no obtuse interior angles?

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An obtuse triangle can have no right angles, and has two equal angles.

The interior angles of a triangle add to 180 degrees. This is true for any triangle, whether it is obtuse angled, right angles or acute.

There are no obtuse angles in a right triangle. A right triangle consists of one right angle and two acute angles.

An isosceles triangle is also an obtuse triangle if one of its interior angles is greater than 90o, an acute triangle if all of its angles are less than 90o, and a right triangle if one of its angles is 90o.Sure it can

No right triangle can have any obtuse angles inside it.

No. A triangle with two complementary interior angles will always result into right triangle. The sum of the complementary angles will always be 90 degrees and the other one will be 90 too.

An acute triangle

the number of obtuse angle in a right triangle is zer0

All triangles have interior angles that add to 180 degrees. Let's call the 3 angles A,B, and C and angles A the 90 degree one. If 90+B+C=180. If angle B was the angle greater than 90 degrees (obtuse) then C would be 0 or negative degrees. Therefore, a right triangle can't have an obtuse interior angle. Sum of all angles in a triangle is 180o. In a right triangle one angle is 90o and other two angles sum up to 90o. A right triangle can't have an obtuse angle because obtuse angle is greater than 90o. So, sum of the two angles(right angle and obtuse angle) will be greater than 180o which is not possible.

A right angle triangle has a 90 degree angle and 2 acute angles An obtuse triangle has 1 obtuse angle and 2 acute angles

0. A right triangle, by definition, will never include any obtuse angles.

No because the 3 interior angles of a triangle add up to 180 degrees

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