Question: P.417b

We use figure t417a, letting AB = a, BC = b, CD = ...

Question: P.420

Suppose the given quadrilateral is MNPQ, and suppo...

Question: P.419

We consider a circle with circumference C, and a c...

Question: P.418b

Suppose ABCDE... is the polygon referred to, with ...

Question: P.418

Suppose (fig. t418) ABCD is the required quadrilat...

Question: P.416

The solution to this problem is only slightly diff...

Question: P.415

Suppose we know the measure of angle \hat{{...

Question: P.414

Suppose (fig. t414) we must draw secant MON throug...

Question: P.413b

Lemma. If two tangent circles are inverted around ...

Question: P.413

One key to this problem is the observation that be...

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