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Does refractive index vary with the angle of incidence?
No. The refractive index is an absolute measure that determines by how much the angle of incidence is different from the angle of reflection.
Can you find the exterior angle before the interior angle?
No, you cannot find the exterior angle before the interior because the interior angles can vary in many ways.
What is the measure of each angle in a parallelogram?
They can vary from 0 to 180 degrees.
What is the formula for calculating the number of stairs needed for a particular height?
Stairs are defined by tread and rise: tread is the depth, front-to-back (or toe-to-heel), of the horizontal surface; while rise is the height, or step-up from one tread to the next.These dimensions can vary depending on design choices, the site requirements, and local building codes.I think the proper approach would be the reverse order...# determine the local building codes # determine your requirements (total height needed, total run/width available) # determine design requirements (steep angle, like a ladder requires greater rise/fewer, shallower treads, more effort to climb; shallower angle requires more steps, more space, but are easier to climb.) One rule of thumb is called the "Rule of 25": a staircase will be safe and easy to climb if the height of two risers plus the depth of one tread equals 25.Try a websearch for "How to design stairs?" for a list of many good articles/ tutorials/ design ideas.Good luck.
How do you find the maximum possible area of an Isosceles triangle with the Height of 20m. The angle of the equal angles can vary but must be no more then 35 degrees.?
An isosceles triangle can be split up into two right angle triangles so use trigonometry to find the base and then double your answer to find the base of the isosceles triangle which works out as 57.12592026 meters. Base = 20/tan(35) = 28.56296013 Base of isosceles = 28.56296013*2 = 57.12592026 Area = 1/2*base*height Area = 1/2*57.12592026*20 = 571.2592026 square meters
