A triangle can have two acute angles right angles stra

SOLUTION

From angle sum property of triangles, sum of the angles should be ${180}^{\circ }$.
 
Acute angles: As acute angle is less than ${90}^{\circ }$, all the three angles in a triangle can be acute to sum up to ${180}^{\circ }$.

Right angle : Right angle is ${90}^{\circ }$, if two angles in a triangle are right angles then all angles sum upto more than ${180}^{\circ }$.

Obtuse angles: Obtuse angle is more than ${90}^{\circ }$, if two are obtuse then sum of all angles exceeds ${180}^{\circ }$.

Hence, a triangle can have two or three acute angle.