Not necessarily.
The two equal angles in an isosceles triangle must both be acute angles. If they were right angles or obtuse angles then a triangle could not be formed.
If the two equal angles are less than 45° each then the third angle is an obtuse angle. If they are both 45° then the third angle is a right angle and if they are both greater than 45° then the third angle is an acute angle.
Chat with our AI personalities
It can be an isosceles triangle or a scalene triangle if it has 1 obtuse angle
it i a triangle that only has one obtuse angle
gay#
Only when it has 2 equal acute angles and 1 obtuse angle that it is an isosceles triangle
An isosceles triangle can have an obtuse angle and two equal acute angles in which all 3 angles add up to 180 degrees.