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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
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A triangle with all angles measuring less than 90 degrees?
A triangle with all angles measuring less than 90 degrees?That's an 'acute' triangle.
What type of triangle has three angles that each measure less than 90 degrees?
An acute triangle is one in which all interior angles are less than 90 degrees.
What is a triangle with all angles measuring less than 90 degrees?
An acute triangle
What has 1 less vertex than a hexagon and 2 more angles than a triangle?
1 vertex less than a hexagon is a pentagon. 2 angles more than a triangle is a pentagon.
Which type of triangle has three angles with measures less than 90°?
A triangle which measures less than 90%
What is a triangle that has three angles with all measuring angles greater than zero but less than ninety?
An acute triangle
What angles are less than ninety degree?
Acute angles.
This is a triangle in which all of the angles are less than 90 and deg?
This is a triangle in which all of the angles are less than 90°.
What angles are greater than ninety but less than eighteen?
You mean: What angles are greater than 90, but less than 180. These are obtuse angles
Why must a right triangle have two acute angles?
A right angle must have two acute angles because since one angle is ninety degrees, than the other two must equal ninety degrees. To make ninety degrees with two angles, both of them must be acute, or less than 90 degrees (each).
What is a triangle with angles less than 90?
An acute triangle.
A triangle with all angles measuring less than 90 degrees?
A triangle with all angles measuring less than 90 degrees?That's an 'acute' triangle.
What is a triangle which all the angles are less than 90?
It is an acute triangle and if the acute angles are of different sizes then it is a scalene triangle.
Does an acute triangle have two right angles?
No, in fact no triangle can have two right angles. The sum of all interior angles of any triangle is 180 degrees. All triangles must have three angles. A right angle is 90 degrees. So if a triangle has two ninety degree angles, there would be no third angle. An acute triangle has all three angles less than 90 degrees. The most common acute triangle is the equilateral 60-60-60 degree triangle.
Which Polygon with less angles than a quadrilateral?
Triangle.
How many angles less than right angles has an equilateral triangle have?
3
A triangle with all angles less than 90 degrees?
It is an acute triangle
