## The contest problem book III: annual high school contests 1966-1972, Volume 3 |

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AABC altitude area of triangle arithmetic mean arithmetic progression base binomial expansion bisector C. D. Olds chord circumcircle common congruent Continued Fractions convex convex polygon coordinates corresponding sides denote the length denote the number diagonal AC diameter digits distance divided divisible by 11 divisor equal equation x2 equilateral equivalent expression factor figure fraction fraternity members geometric geometric mean given equation graphs H. S. M. Coxeter Hence hour hypotenuse identity inches inequality infinite inscribed interior angles intersect law of cosines linear log2 Mathematical midpoint multiplying number of positive obtain pair parallel perpendicular polygon positive integer positive numbers Pythagorean Theorem Pythagorean triple quadratic equation quadrilateral quotient radii radius real numbers rectangle remainder respectively right triangle roots satisfy segment side AC solution square subtracted tangent triangle ABC vertex zero