 | 268 páginas
...Jr to AB. 1 25, 3. Prove by means of Proposition 48 that the straight lines, drawn from the vertices of a triangle perpendicular to the opposite sides, meet in a point. In & ABC let AD, BE J.rs to BC, CA resply meet in O. Draw COF to meet AB in F. Now sqs on BC, AO =... | |
 | 1914 - 566 páginas
...each train travels. (7 marks.) 3. Prove that the three straight lines drawn from the angular points of a triangle perpendicular to the opposite sides meet in a point. (7 marks.) 4. Construct an isosceles triangle having each of the angles the base double of the angle... | |
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... proves the proposition. The lines drawn from the angles of a triangle perpendicular to the opposite sides meet in a point. The equation to BC is, (Art. 35), hence the equation to the line through A perpendicular to BC is, (Art. 44), y The equation... 
