The problem asks us to draw a triangle with a base of 7 cm, and angles of 40 degrees and 20 degrees at the ends of the base. We then need to measure the length of the side labeled $x$ to 1 decimal place.

1. Problem Description

The problem asks us to draw a triangle with a base of 7 cm, and angles of 40 degrees and 20 degrees at the ends of the base. We then need to measure the length of the side labeled $x$ to 1 decimal place.

2. Solution Steps

Step 1: Draw a line segment 7 cm long. This will be the base of the triangle.

Step 2: At one end of the line segment, use a protractor to draw an angle of 40 degrees.

Step 3: At the other end of the line segment, use a protractor to draw an angle of 20 degrees.

Step 4: Extend the lines from the two angles until they intersect. This will form the third vertex of the triangle.

Step 5: Measure the length of the side labeled $x$ using a ruler. The value will be approximate, since this method is not perfectly precise.

Step 6: Round the measured length to 1 decimal place.

After performing the steps described above, the length of side $x$ is approximately 5.0 cm.

Note: Depending on the accuracy of the drawing, the answer may vary slightly.

3. Final Answer

5.0 cm