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this is known as an acute triangle

acute triangles-no angles congruent or greater than 90 degrees

right-one angle equal to 90 degrees

obtuse-triangle with one angle greater than 90 degrees

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โˆ™ 2011-01-18 22:49:24
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โˆ™ 2011-11-20 12:13:44

This is called an acute triangle.

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Q: Triangles with all angles less than 90 degrees?
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Related questions

What do equilateral triangles and acute triangles have in common?

All their angles are less than 90 degrees.


What triangle has less than 90 degrees?

Triangles, by definition, have 180 degrees. Angles that are less than 90 degrees are said to be acute.


Which triangles are acute triangles?

An acute triangle has all three angles less than 90 degrees.


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


Are all acute triangles equilateral triangles?

No, but all equilateral triangles are acute. Acute: All angles of the triangle are less than 90 degrees. Equilateral: All angles of the triangle are 60 degrees.


What triangles are classified by their angles?

Acute triangles have all of their angles less than 90 degrees. Right triangles have one of their angles equal to 90 degrees. Obtuse triangles have one of their angles greater than 90 degrees. Also, the 45-45-90 triangle and 30-60-90 triangle are useful when trying to get exact answers in trigonometry.


Every equilateral triangle must also be an acute triangle?

Equilateral triangles have angles that all equal 60 degrees. Acute triangles all have an angles that are less than 90 degrees.


Can you show me the equilateral that is also an acute triangles a pictue of it?

All equilateral triangles are acute triangles, since all the angles are less than 90 degrees.


When will a triangle not equal 180 degrees?

never In non-Euclidean geometry triangles can have angles that are more or less than 180 degrees.


Is an equilateral triangle an acute triangle?

Yes. All equilateral triangles are acute triangles, as they have 3 angles of 60 degrees each, all less than 90 degrees.


Can an acute triangle be an right triangle?

No, acute triangles must have all angles less than 90 degrees.


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