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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.
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How can triangles be classified?
sides, and angles
Do triangles have at least one right angle?
Triangles can be classified by their sides or their angles. When classifying them by their angles, triangles are called: acute triangles - all three angles are acute (less than 90º) right triangles - one right angle (90º) and two acute angles obtuse triangles - one obtuse angle (larger than 90º) and two acute angles
What is anther types of a triangles?
Triangles can be classified by their sides: equilateral, isosceles, scalene or by their angles: acute, right, obtuse. Combinations are possible.
Is a triangle an isosceles triangle?
It can be, if two of the sides and two of the angles are equal. Triangles can be classified by their sides: equilateral, isosceles, scalene or by their angles: acute, right, obtuse. Combinations are possible.
What triangles can be classified as a right triangle?
Any triangle that has a 90 degree angle and two acute angles is a right angle triangle.
