An acute angled triangle or acute triangle is a triangle with three acute angles, which are angles measuring less than 90 degrees.
Examples of acute triangles with angles less than 90 degrees.
40^{0}, 51^{0}, 89^{0}
32^{0}, 61^{0}, 87^{0}
60^{0}, 60^{0}, 60^{0}
53^{0}, 76^{0}, 51^{0}
2^{0}, 89^{0}, 89^{0}
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