0
False because angles greater than 0 but less than 90 degrees are acute angles
Wiki User
∙ 6y ago
Add your answer:
Earn +20 pts
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.)
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.
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.)
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.
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.
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.
How are acute and obtuse triangles the same?
Similarities between these and all triangles are:They all have 3 sides and 3 angles. The sum of the three angles adds up to 180°.An acute angle is less than 90 degrees. An acute triangle has all three sides are acute.An obtuse angle is more than 90 degrees. An obtuse triangle has one angle which is obtuse, and because of the 180° rule above, the other two angles will be acute.So all triangles will have at least two acute angles.
Can a acute triangle be an obtuse triangle?
No, all three angles must be less than 90 degrees each in an acute triangle. In an obtuse triangle one of the angles is greater than 90 degrees. A triangle with a 90 degree angle is called a right triangle.
