Mathematical Terms Derived From Latin

• plus, more, increased by.
• minus, less, diminished by.
• multiplication, from multiplicare, to make manifold or many fold.
• division, from dividere, divide.
• subtraction, from subtrahere, withdraw, draw from beneath.
• addition, from addere, add to, or additio, adding.
• ratio, from ratio, reason.
• quotient, from quotiens, how often, how many times.
• sum, from summa, sum or total, or summus, highest.
• number and numeral, from numerus, number.
• integer, from integer, whole, untouched.
• fraction, from frangere, break.
• percent and per centum, from per centum, by the hundred, in the hundred.

Geometrical Terms Derived From Latin

• perpendicular, from per, through, and pendere, hang.
• circumference, from circum, around, and ferre, carry.
• radius, from radius, staff, rod, ray.
• arc, from arcus, bow, arc.
• tangent, from tangere, touch.
• angle, from angulus, angle, corner.
• obtuse, from obtundere, strike.
• acute, from acuere, sharpen.
• triangle, from tri, three, and angulus, angle.
• rectangle, from rectus, right, and angulus, angle.
• Q.E.D., abbreviation of quod erat demonstrandum, which was to be demonstrated.

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