🇬🇧 Obtuse meaning: English Vocabulary Flash Card

An obtuse angle is a wide, “stretched-out” angle. It opens more than a right angle (which is exactly 90°) but doesn’t stretch all the way into a straight line (which is 180°). So if a right angle looks like the corner of a book, an obtuse angle looks like that corner opened up wider, but not completely flat.

I told my little brother, “If your legs make an obtuse angle on the couch, you’re basically doing geometry instead of being lazy.”

The obtuse angle looked at the tiny acute angle and said, “You’ll grow up one day, kid.”

The obtuse angle bragged, “I’m bigger than a right angle but still not as dramatic as a straight line.”

I tried to draw an obtuse angle, but it turned into a very confused triangle that needed a math tutor.

Every triangle can have at most one obtuse angle—any more, and the triangle would flatten out and quit its job as a triangle.

In art class a child drew a door wide open at an obtuse angle. The teacher tapped the sketch and said, "Not acute, obtuse." The child erased, opened arms like an obtuse corner, drew the wide door again. Friends pointed at the big obtuse space, laughed at the sudden sun through the obtuse opening, and clapped.

This word is at the C2 level, which means it represents the highest mastery of English. It’s often used in specialized or highly formal contexts and helps you communicate with precision and subtlety, much like a native speaker.

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