Classify triangles by angles
The question
acuterightobtuse
Is this triangle acute, right, or obtuse?
Name this triangle
How it works.
angles:15°40°125°
angles:15°40°125°
angles:15°40°125°
obtuse
- 01
A triangle can be named by its angles or by its sides. This asks for the angle name, so look at the angles.
- 02
Look at the biggest angle — it decides the type. Here that is 125°.
- 03
More than 90, so it is obtuse.