alleryIn which triangle are all the angles less than 90°?
ARight triangle
BObtuse triangle
CAcute triangle
DStraight triangle
Answer & Solution
Correct answer: C. Acute triangle
1. A triangle with every angle below 90° is acute.
2. A right triangle has one 90° angle.
3. An obtuse triangle has one angle above 90°, and 'straight triangle' is not a type.
_Source: Wikipedia, Triangle, Definition, terminology, and types_
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