An acute angle is an angle less than a right angle.
Father of geometry
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"No trace of Euclid's personality has survived."
Shocking"Of trilateral figures, an equilateral triangle is that which has its three sides equal, an isosceles triangle that which has two of its sides alone equal, and a scalene triangle that which has its thr…"
Strange & Unusual"The greatest common divisor of two numbers can be found by successive division."
Strange & Unusual"To describe a circle with any centre and radius."
Shocking"If a straight line be drawn from the ends of a straight line, it will be a triangle."
Strange & Unusual