Question

Based on the angle measures given, which triangle is not acute?

• A. ${35}^{\circ },{69}^{\circ },{76}^{\circ }$
• B. ${60}^{\circ },{60}^{\circ },{60}^{\circ }$
• C. ${88}^{\circ },{46}^{\circ },{46}^{\circ }$
• D. ${90}^{\circ },{45}^{\circ },{45}^{\circ }$

Answer 1

The correct option is D ${90}^{\circ },{45}^{\circ },{45}^{\circ }$

For acute angles triangle all the three angles must be less than ${90}^{\circ }$.

In option $D$ one of the angle is ${90}^{\circ }$ , so it is not acute angles triangle.