No. All triangles MUST have at least two acute angles.
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All right angle triangles have a 90 degree angle and two acute angles that add up to 90 degrees
All triangles have at least 2 acute angles. All 3 angles of a triangle will equal 180 degrees.
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
All right angle triangles have 2 acute angles and one 90 degree angle.
an acute triangle is a triangle that has corner angles all below 90 degrees. there are three types of triangles: obtuse, right, and acute. obtuse triangles have one corner angle greater than 90 degrees, right triangles have one angle equal to 90 degrees, and acute triangles have all corner angles less than 90 degrees.