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Earn +20 ptsQ: Isosceles triangles may be obtuse or acute but never right?
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An isosceles triangle may be right or acute but never obtuse.?
False
What triangle is never an acute or obtuse triangle?
right triangle
An isoscles may be right or acute but never obtuse?
False
Is an acute angle and an obtuse angle sometimes always or never complementary?
Two angles are complementary when they add up to exactly 90 degrees. An obtuse angle is by definition greater than 90 degrees. Therefore, an obtuse angle cannot have a complementary angle. So an obtuse angle and an acute angle are never complementary.
Can a right triangle be acute or scalene or isosceles?
A right triangle may be isosceles or scalene (though not at the same time), but never acute, since an acute triangle is defined as having all interior angles less than 90°. A right triangle by definition has one 90° angle.
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