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Q: Are alternative interior angles always acute?

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An acute triangle has three interior acute angles An obtuse triangle has one obtuse and two acute interior angles

A regular 10 sided decagon has 10 exterior acute angles each measuring 36 degrees It has no interior acute angles because each interior angle measure 144 degrees

A trapezoid always has two acute angles. the base angles have to be acute because the lower base angles and the upper base angles are complementary so since the upper base angle is always obtuse, the lower base angles have to be acute.

NO they are not.

It has 3 interior acute angles 2 of which are equal in size

Related questions

Any polygon can contain acute interior angles.

Not always because one of the interior angles could be obtuse.

Although a triangle must have at least two acute interior angles, a square has four interior right angles and no acute angles. And as regular polygons have increasing numbers of sides, their interior angles get larger.

No because it has 2 equal interior acute angles and 2 equal interior obtuse angles but its 4 sides are equal in length

An acute triangle has three interior acute angles An obtuse triangle has one obtuse and two acute interior angles

Only if it is a rectangle otherwise it has equal opposite acute angles and equal opposite obtuse angles and the 4 interior angles add up to 360 degrees

A regular six-sided hexagon has no interior acute angles, but it does have six interior obtuse angles, each measuring 120 degrees

There are no acute angles in a rectangle which has 4 equal interior right angles

Sometimes it is if its 3 interior angles are acute angles and add up to 180 degrees

A triangle has only 3 interior angles. It may have either 3 acute internal angles or 2 acute and 1 obtuse internal angles.

No. If all 5 angles were acute, then they would add up to less than (5 x 90Â°) = 450Â°. But the sum of the interior angles of a pentagon is always 540Â° .

Yes. In fact, there has to be at least two. Acute angles are angles less than 90 degrees.

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