Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 123
e polars of the vertices of a A ABC form a A ABC^ proveAA, BB, CC, are concurrent. Note. —The polars of the vertices of ABC are the sides of ABC. 8. If a circle is inscribed in a A, show thatthe lines drawn from the vertices to the oppo-site points of contact are concurrent. Suggestion. — A ABC and… … Fig. 89. 10. If a circle is inscribed in a quadrilateral,show that the diagonals and the lines joiningthe opposite points of contact are all concur-rent. 11. Find the polar of (— 9, — 7) with respectto x^ + y- = 14. 12. Find the polar of (■to x + y ^ 3. 2) with respect
Geometry, Analytic
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-31-35.webp)
![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-134-367.webp)
