# How many obtuse angles can a right triangle have?

A triangle has three angles that add up to ${180}^{\circ}$. An obtuse angle is greater than ${90}^{\circ}$ and less than ${180}^{\circ}$. An acute angle is less than ${90}^{\circ}$.
A right triangle has a right angle, which is ${90}^{\circ}$, which means that the sum of the other two angles is ${90}^{\circ}$. This means that the other two angles cannot be greater than ${90}^{\circ}$.