You will need to know the following A triangle has three angles and three sides. The side opposite the right angle is called the hypotenuse . The square symbol in the diagram indicates a right angle. The side opposite an acute angle is called the opposite side for that angle. A ratio is an expression that compares two quantities by division.
Students can use a protractor instead of an astrolabe to do the measurement.
Simply tape or tie the string with the weight directly to the protractor at the origin. However, there is some benefit from constructing an astrolabe, which you can keep to use later. Preparation Find a tall object to measure, such as a flagpole, light post, or telephone pole. Read or print this page with Figures 5.1, 5.2, 5.3, and the Tangent Table. The challenge of measuring remote objects.