Lab #5. Parallax Measurements and Determining Distances
Height-to-Width Ratios (r/d) and angles (α) for Right Triangles
This table contains height-to-width ratio (r/d), for right triangles containing angles (α) ranging from zero to 80 degrees. Those of you with backgrounds in trigonometry may recognize that the ratio of the height to the width for such triangles is often called the tangent function.
| (r/d) | α |
|---|
0.0000 0.0 0.0017 0.1 0.0035 0.2 0.0052 0.3 0.0070 0.4 0.0087 0.5 0.0105 0.6 0.0122 0.7 0.0140 0.8 0.0157 0.9 0.0175 1.0 0.0192 1.1 0.0209 1.2 0.0227 1.3 0.0244 1.4 0.0262 1.5 0.0279 1.6 0.0297 1.7 0.0314 1.8 0.0332 1.9 0.0349 2.0 0.0524 3.0 0.0699 4.0 0.0875 5.0 0.1051 6.0 0.1228 7.0 0.1405 8.0 0.1584 9.0 0.1763 10.0 0.1944 11.0 0.2126 12.0 0.2309 13.0 0.2493 14.0 0.2679 15.0 0.2867 16.0 0.3057 17.0 0.3249 18.0 0.3443 19.0 0.3640 20.0 0.3839 21.0 0.4040 22.0 0.4245 23.0 0.4452 24.0 0.4663 25.0 0.4877 26.0 0.5095 27.0 0.5317 28.0 0.5543 29.0 0.5774 30.0 0.6009 31.0 0.6249 32.0 0.6494 33.0 0.6745 34.0 0.7002 35.0 0.7265 36.0 0.7536 37.0 0.7813 38.0 0.8098 39.0 0.8391 40.0 0.8693 41.0 0.9004 42.0 0.9325 43.0 0.9657 44.0 1.0000 45.0 1.0355 46.0 1.0724 47.0 1.1106 48.0 1.1504 49.0 1.1918 50.0 1.2349 51.0 1.2799 52.0 1.3270 53.0 1.3764 54.0 1.4281 55.0 1.4826 56.0 1.5399 57.0 1.6003 58.0 1.6643 59.0 1.7321 60.0 1.8040 61.0 1.8807 62.0 1.9626 63.0 2.0503 64.0 2.1445 65.0 2.2460 66.0 2.3559 67.0 2.4751 68.0 2.6051 69.0 2.7475 70.0 2.9042 71.0 3.0777 72.0 3.2709 73.0 3.4874 74.0 3.7321 75.0 4.0108 76.0 4.3315 77.0 4.7046 78.0 5.1446 79.0 5.6713 80.0