how do you get the height of a object?

Answer 1

Use Pythagorean theorem or if you know the area of a triangle, you can find its height by using the formula:
Area of a triangle= 1/2 x base x height

But I still don't know what the exact problem is; so it would be of more help to the answerer to know more information about the problem. So, please complete your question by adding details to it.

Answer 2

The answer about shadows is correct. Here is another method. Attach a string with a weight to the center of a protractor. Standing a known distance from the object in question, look down the staight edge of the protractor at the top of the object. The string will hang and give you an angle on the protractor. Now you have an angle and a known side of the triangle. The rest is right triangle trig. For example if you stood 100 ft from a tree and measured a 45 deg angle. The tree would be 100 ft tall plus the height of your eyes from the ground. Don't forget to factor that in!

Answer 3

If the object is outside, you can use the concept of similar triangles that should have been taught to you in 10th grade geometry or sooner.

Take the flagpole outside of city hall for instance. Measure the length of the flagpole's shadow from the centerline of the flagpole. Then measure your height and the length of your shadow. Divide H/L and take the product and multiply it times the length of the flagpole shadow to get its height.

...or go into the city hall and look up the height in engineering records.

Answer 4

Your question is not specific enough. Different objects require different formulas for height. Also if you know the formula for area of the object you are looking for you can manipulate it to fit height.

Answer 5

I prefer a tape measure

Answer 6

Typically, you measure it.