0
NO!!!
Equilateral ; All angles acute (60 degrees) ; all sides the same length
Isosceles ; Two angles are equal, the third angle may be acute or obtuse ; two sides are equal , third side unequal
Right- Angles Triangle ; Maybe Isoscles , but MUST have one right angle(90 degrees)
Scalene ; All angles are different, may be obtuse ; All sides are different.
NB Any angle less than 90 degrees is Acute
Any angle greater than 90 degrees but less than 180 degrees is Obtuse
Any angle greater than 180 degrees (- 360 degrees) is Reflex.
Still curious? Ask our experts.
Chat with our AI personalities
Maxine
Steve
JordanNot at all. It one angle is 90° it is a right triangle. If any angle is greater than 90° then it is an obtuse triangle. Picture a triangle with angles of 10° 10° and 160° ■
At least two of the three angles must be acute, or less than 90 degrees. The other may be acute, a right angle (90 degrees), or an obtuse angle (greater than 90 degrees). In a flat plane (Euclidean) the three angles always add up to 180 degrees.
Add your answer:
Earn +20 pts
Do all triangles have at least two acute angles?
Yes
Is all acute triangles similar?
Only if they have the same angles
Is a triangle 180 degrees or 360 degrees?
Triangles whether acute, obtuse, equilateral or scalene will only ever have angles that add to 180 degrees.
Are Isosceles triangles right obtuse and acute?
yes a isosceles triangle has a right,obtuse and acute angle.
What are three ways to classify a triangles by its angles?
The three kinds of triangles are:right triangle :one of the angles is a right angle (i.e. measures 90 degrees)acute: All of the angles measures less than 90 degrees. A special case of acute isthe equiangular or equilateral triangle in which all angles measure 60 degrees;obtuse: One of the angles measure more than 90 degrees.
