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Types of triangle: By lengths of sides (equilateral, Isosceles, Scalene) By internal angles (Right, Obtuse, Acute). illustration for educational and science use
Wooden pen drive placed on a white background, open at an obtuse angle with the USB connector pointing down.
An obtuse angle calling another angle narrow
A teacher explaining angles on a drawing tablet
log wall, joining logs at an obtuse angle

Free stock photosobtuse angle (54)

Dramatic abstract zigzag pattern with autumnal colorsImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/dramatic-abstract-zigzag-pattern-autumnal-colors-274989668">Image used under license from Freestock.com</a>
Snazzy geometric pattern of zigzags with cool tones for motifs of angularity, alternation, synergyImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/snazzy-geometric-pattern-zigzags-cool-tones-276589847">Image used under license from Freestock.com</a>
Varicolored geometric pattern of zigzags for decoration and backgrounds with themes of recurrence, predictability, variationImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/varicolored-geometric-pattern-zigzags-decoration-backgrounds-282726296">Image used under license from Freestock.com</a>
Abstract zigzag pattern for themes of variation or angularity in decoration and backgroundImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/abstract-zigzag-pattern-themes-variation-angularity-274987082">Image used under license from Freestock.com</a>

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