In geometry, the measure of an interior angle of a polygon is the angle formed by two adjacent sides of the polygon. The interior angle is the angle between the two sides of the polygon that intersect at the vertex. The measure of an interior angle of a polygon is the sum of the measures of the interior angles of the polygons. The sum of the measures of the interior angles of a polygon is 180 degrees.

## Place the protractor

Place the protractor on the line segment between the vertex and the point of measurement. The base line of the protractor should start at the vertex. The midpoint of the protractor’s base line should be lined up with the point of measurement.

Ensure that the protractor is at the correct angle. The zero line of the protractor should be lined up with one of the lines of the angle. If it is not, rotate the protractor until it is.

Once the protractor is in place, look at the number where the other line of the angle intersects with the protractor. This is the measure of the angle.

To find the measure of an interior angle, start by lining up the 0 degree line with one side of the angle. Then, use a protractor to measure the angle. The protractor will have two arms: one arm will be longer than the other. Place the center of the protractor on the vertex of the angle, and line up the shorter arm with the other side of the angle. The measurement will be the number of degrees between the 0 degree line and the other side of the angle.

You can also use a ruler to find the measure of an interior angle. First, line up the 0 degree line with one side of the angle. Then, place the ruler so that it is perpendicular to the angle. The measurement will be the number of degrees between the 0 degree line and the other side of the angle.

To find the measure of an interior angle, you can also use a piece of string. First, line up the 0 degree line with one side of the angle. Then, tie the string around the other side of the angle. The measurement will be the number of degrees between the 0 degree line and the string. You can also use a piece of yarn or a ribbon.

To find the measure of an interior angle, you need to know where the other side of the angle crosses the protractor. Place the center of the protractor on the vertex of the angle. The other side of the angle will cross the protractor at some point. Find where it crosses and read the number next to that point. That is the measure of the angle.

You can also use a protractor to find the measure of an exterior angle. Just place the center of the protractor on the vertex of the angle, and the other side of the angle will cross the protractor at some point. Find where it crosses and read the number next to that point. That is the measure of the angle.

You can also use a protractor to find the measure of an angle formed by two lines. Just place the center of the protractor on the vertex of the angle, and the other side of the angle will cross the protractor at some point. Find where it crosses and read the number next to that point. That is the measure of the angle.

To find the measure of an interior angle, start by drawing a line from one endpoint of the angle to the other. Then, use a protractor to measure the angle. The number where the line crosses is the degree of the angle.

To find the measure of an interior angle, start by drawing a line from one endpoint of the angle to the other. Then, use a protractor to measure the angle. The number where the line crosses is the degree of the angle. You can also find the degree of an angle by subtracting the measure of the adjacent angle from 180 degrees.

To find the measure of an interior angle, there are a few steps you need to follow. First, draw a line from one endpoint of the angle to the other. Next, use a protractor to measure the angle. The number where the line crosses is the degree of the angle. You can also find the degree of an angle by subtracting the measure of the adjacent angle from 180 degrees.

If you want to find the measure of an interior angle, you can use a few different methods. One way is to draw a line from one endpoint of the angle to the other, and then use a protractor to measure the angle. The number where the line crosses is the degree of the angle. Another way to find the degree of an angle is to subtract the measure of the adjacent angle from 180 degrees.

## Do not read from the outside of the protractor

When taking measurements with a protractor, it is important to make sure that you are reading the measurement from the correct side. The zero mark on the protractor should be lined up with the vertex of the angle, and the angle measurement should be read from the inside of the protractor.

If you read the measurement from the outside of the protractor, you will get an incorrect measurement. This is because the measurement is reversed on the outside of the protractor. To avoid this, make sure to take the measurement from the inside of the protractor.

It is also important to make sure that the protractor is lined up correctly before taking the measurement. If the protractor is not lined up correctly, the measurement will be incorrect. Make sure to line up the zero mark on the protractor with the vertex of the angle before taking the measurement.

## Always read the smaller number

To find the measure of an interior angle, always read the smaller number on the protractor. In the picture below, the measure of angle BAC is 50°.

Remember, the larger number is the measure of the exterior angle.

To find the measure of an interior angle, first determine whether the angle is a reflex angle. A reflex angle is an angle whose measure is greater than 180 degrees. If the angle is a reflex angle, add 180 degrees to the number where the line crosses.

For example, if the line crosses at the number 200, the measure of the interior angle would be 200 + 180, or 380 degrees. However, if the angle is not a reflex angle, the measure of the interior angle can be found by subtracting the number where the line crosses from 360 degrees.

For example, if the line crosses at the number 200, the measure of the interior angle would be 360 – 200, or 160 degrees.

## If the angle is obtuse, subtract 180 degrees from the number where the line crosses

To find the measure of an obtuse angle, subtract 180 degrees from the number where the line crosses. For example, if the line crosses at 90 degrees, the measure of the angle would be 90 degrees – 180 degrees, or -90 degrees.

It is also possible to find the measure of an obtuse angle by using the properties of complementary angles. complementary angles add up to 90 degrees, so if one angle is known, the other can be found by subtracting it from 90 degrees.

For example, if an angle is known to be 60 degrees, the measure of its complement would be 90 degrees – 60 degrees, or 30 degrees.

## Some protractors have a degree scale on both sides

You can use this to your advantage when finding the measure of an interior angle. Let’s say you want to find the measure of angle BAC. You would line up one side of the angle with the 0 degree mark on the protractor, making sure that the vertex is in the center of the protractor. Then, you would line up the other side of the angle with the 180 degree mark. The number where the two sides of the angle cross is the measure of the angle.

You can also use this method to find the measure of an exterior angle. For this, you would line up one side of the angle with the 0 degree mark, and the other side with the 360 degree mark. Again, the number where the two sides cross is the measure of the angle.

If you need to find the measure of an angle that is more than 180 degrees, you can use either method. Just line up one side of the angle with the 0 degree mark, and the other side with the appropriate degree mark (360 for an interior angle, 180 for an exterior angle).

To find the measure of an interior angle, you need to first determine which side of the angle is the 0 degree line. If the angle is between 0 and 180 degrees, use the side with the 0 degree line. Then, use a protractor to measure the angle from the 0 degree line to the other side of the angle. The angle will be the number of degrees shown on the protractor.

For example, if the angle is on the left side of the 0 degree line, and the protractor shows that the angle is 45 degrees, then the angle is 45 degrees.

If the angle is on the right side of the 0 degree line, then the angle is 180 degrees minus the number of degrees shown on the protractor. So, if the angle is on the right side of the 0 degree line, and the protractor shows that the angle is 45 degrees, then the angle is 135 degrees.