Question

Which of these shows an obtuse angled triangle?

• A. $45°,45°,90°$
• B. $40°,60°,80°$
• C. $10°,95°,95°$
• D. $30°,45°,105°$

Answer 1

The correct option is D $30°,45°,105°$

A triangle in which one angle is greater than $90°$ is called an obtuse angled triangle. Thus, the measure of angles of an obtuse angled triangle can be $30°,45°,105°$.
So, option (d) is correct.