An obtuse-angled triangle is one in which all the angles are less than 90°. State true or false.
An obtuse triangle is one with one obtuse angle (greater than 90°) and two acute angles. Therefore, the given statement is not true.
An obtuse-angled triangle is one in which all the angles are less than 90∘.
State whether the following statement is true or false.
If one angle of a triangle is less than 90 degrees, it is known as an acute-angled triangle.
All angles greater than 90∘ are obtuse angles. True or false.