You will need

- - vertical or horizontal building level;
- - plumb
- - protractor;
- - protractor;
- - smooth wooden beam of length 1.5 m;
- laser level measuring ruler;
- - hydrolevel any marker, peg 2;
- roulette.

Instruction

1

To determine the angle of inclination of the plane the simplest way to use a plumb line, a wooden block and protractor. Put the timber to check the plane. Left hand hold the plumb line at an altitude of 300 – 400 mm. Move the plumb line to the edge of the timber. Reassure the lower part of the slope. The right hand vertically set the protractor with the flat side on the Board. Move the protractor to align the reference point of the protractor with the string of the plumb. Consider the angle of the plane intersection line of the plumb with the scale of the protractor. Get the angle of the plane relative to the vertical. If the desired angle relative to the horizon, calculate it, subtracting from the received angle of 90. This method is use for rough measurements, as it gives a low measurement precision of the angle of inclination of the plane.

2

More specific the following measurement method. Put the timber to check the plane. On the edge of the beam vertically, check the level. Level keep left hand. The right hand attach the protractor to the sides of the angle. On a scale of protractor think of the angle of inclination of the plane.

3

The most accurate method, which used laser level. Install horizontally the base level. Turn on the laser head. Measure the level of elevation from the horizontal of the laser beam to the surface of the plane check on the section length of 1 m. When the value of the differential up to 1 m in this area every of 2.22 cm drop close to 1 degree.

4

High precision of tilt measurement can be achieved using hydrolevel any is a laser level. Measurement hammer parallel to the tilt plane of the two markers at a distance of 1 m. they Mark the horizon with hidrorema. Measure the distance from the labels to the horizon plane. Subtract the larger from the smaller size – get the size of the difference in height at a distance of meters. This value divide by 2.22 and get the angle of the measured area of the plane in degrees.

# Advice 2: How to measure the angle

**The angle**

**of inclination of**any line or surface can be found, knowing the trigonometric functions. Regardless of whether you calculate the angle

**of inclination**of the roof, the back of the sofa, post or a straight line on a sheet of paper, methods of determining the angle will be the same.

You will need

- roulette;
- - plumb
- - scientific calculator.

Instruction

1

To find the angle

**of slope**, draw a right triangle, the slant line will act as the hypotenuse. To do this, use the plumb Bob, as it always creates with the ground is a right angle. Choose a starting point on your inclined plane or line, and with the help of a plumb line and measuring tape, measure the distance from that point to the earth (or any other horizontal surface such as the floor). If not plumb, just take the load and hang it on the rope. This distance is called the opposite side.2

Then measure the distance from the point in which you rested your plummet, to the point where inclined surface rests on the ground (floor). This will be the adjacent side over. If this distance is hard to find, instead find the length of the inclined surface from the starting point to the ground (floor). It will be the hypotenuse. Anyway, in your possession should be at least two numbers are the hypotenuse and one leg or two leg.

3

If you know the length of the hypotenuse and the length of the opposite sides, calculate the sine (sin), dividing the length of the leg to the length of the hypotenuse. Now, to find the angle itself, using engineering calculator, find the inverse sine (arcsin) of the obtained number. Notice the calculator symbol may be this: sin^(-1) or asin. You will receive the angle value in degrees.

4

If you are aware of the length of the adjacent sides and the hypotenuse, find the cosine (cos), to do this, divide the length of the leg to the length of the hypotenuse. Take a calculator with a button agso (or acos or cos^-1) and calculate the inverse cosine, which is the desired angle

**of inclination**in degrees.5

To measure the angle

**of inclination**at known legs, find the tangent (tg). To do this, divide the tangent to opposite adjacent. Then from that number using a calculator calculate arctg (it can also be denoted atan or tan^-1). The resulting value will be the size of the angle in degrees.Is the advice useful?

If you have to measure the angle of inclination often enough, purchase a special device - a protractor.