- AAcute
- BRight
- CObtuse
- DStraight
Step-by-Step Solution
They add to 180°. If one is less than 90 deg (acute), the other must be more than 90 deg (obtuse) to make 180°.
Answer: C) Obtuse
On a straight line, two angles together form a straight angle.
If one of them is acute, what type must the other angle be?
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