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What all angles are less than 90 are obtuse?

Anonymous

∙ 7y ago

Updated: 12/16/2022

False because angles greater than 0 but less than 90 degrees are acute angles

Wiki User

∙ 7y ago

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Q: What all angles are less than 90 are obtuse?

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How many obtuse angles could an isosceles triangle have?

An Isosceles Triangle is a triangle with all angles less than 90o So there are no obtuse angles (between 90o to 180o).

What shape has obtuse angles triangle hexagon pentagon or square?

A hexagon or pentagon will have obtuse angles (greater than 90 degrees). A triangle has angles that are all less than 90 and a square has only 90.

Do triangles have at least 2 acute angles?

Yes. The sum of the angles in a triangle is 180° All angles in a triangle must be greater than 0° which means that the sum of any two angles must be less than 180° If two angles are right angles (90°), their sum is 180° which is not less than 180°; thus at most one angle can be a right angle. If one angle is a right angle and another is an obtuse angle (greater than 90°), then their sum is greater than 180°, which is not less than 180°; thus there can be at most one of a right angle and an obtuse angle. If two angles are obtuse angles, their sum is greater than 180°, which is not less than 180°; thus there can be at most one obtuse angle. If there is at most one right angle or an obtuse angle, there must be at least two acute angles.

What shape has all angles greater than 90 degrees?

All the angles in an octagon are obtuse. (Obtuse means greater than 90 degrees.)

What are all the angles that are measure of less than 180 degrees?

Half of them are acute, and half of them are obtuse. There are an infinite number of them altogether.

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Related Questions

How many obtuse angles could an isosceles triangle have?

An Isosceles Triangle is a triangle with all angles less than 90o So there are no obtuse angles (between 90o to 180o).

What shape has obtuse angles triangle hexagon pentagon or square?

A hexagon or pentagon will have obtuse angles (greater than 90 degrees). A triangle has angles that are all less than 90 and a square has only 90.

Which shapes have an obtuse angle?

Oh, dude, obtuse angles are like those chill angles that are greater than 90 degrees but less than 180 degrees. So, shapes like obtuse triangles, obtuse trapezoids, and obtuse pentagons totally rock those angles. Just imagine them lounging around, being all nonchalant and stuff.

Do triangles have at least 2 acute angles?

Yes. The sum of the angles in a triangle is 180° All angles in a triangle must be greater than 0° which means that the sum of any two angles must be less than 180° If two angles are right angles (90°), their sum is 180° which is not less than 180°; thus at most one angle can be a right angle. If one angle is a right angle and another is an obtuse angle (greater than 90°), then their sum is greater than 180°, which is not less than 180°; thus there can be at most one of a right angle and an obtuse angle. If two angles are obtuse angles, their sum is greater than 180°, which is not less than 180°; thus there can be at most one obtuse angle. If there is at most one right angle or an obtuse angle, there must be at least two acute angles.

What shape has all angles greater than 90 degrees?

All the angles in an octagon are obtuse. (Obtuse means greater than 90 degrees.)

Can a rectangle have an obtuse angle?

No, a rectangle cannot have an obtuse angle. By definition, a rectangle is a quadrilateral with four right angles (90-degree angles). An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees. Therefore, in a rectangle, all angles must be right angles, making it impossible for an obtuse angle to exist within a rectangle.

What are all the angles that are measure of less than 180 degrees?

Half of them are acute, and half of them are obtuse. There are an infinite number of them altogether.

Why can a triangle not have more than one obtuse angle?

Since all triangles have exactly 180º and an obtuse angle is an angle greater than 90º but less than 180º if you had two obtuse angles, that would leave 0º or less left over for the final angle of the triangle.

Is a straight angle less then an obtuse angle?

no it is more. obtuse is 91 - 179 and straight angles are all 180

How many obtuse angles are in a rectangular pentagon?

it is 3 obtuse angles. A pentagon has five obtuse internal angles in plan view. i.e. looking down on it from above. A pentagon has five obtuse internal angles in plan view. i.e. looking down on it from above.

Triangle with all angles less than ninety?

In plane geometry, all triangles have the sum of the angles to be 180 degrees. So There are many triangles with all the angles less than 90. ( if one angle is more than 90 degrees, then its called 'obtuse' , if all the angles are less than 90, then its called 'Acute' ). Two types of triangles with angles less than 90 degrees are Equalaterial and Isocoles. ( Equalaterial have two equal angles, Isocoles have three equal angles, all 60 degress ). You can think in terms of sets: The subset of Triangles is Acute, The subset of Acute Triangles is Equalateral, The subset of Equalateral Triangles is Isocoles. {Triangles{Obtuse|Acute{Equlaterial{Isocoles

Can a triangle have one obtuse andgle and two acute angles?

No. If a triangle has an obtuse angle, the other two will be acute.Addition from another contributor: The measurement of all three of a triangle's angles combined is always 180 degrees, and an obtuse angle is by definition greater than 90 degrees and less 180. Thus, any possible combination of two obtuse angles, even of the smallest possible, (if there was such a thing) would still yield a measure greater than 180 degrees.

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