To draw triangle ABC with side lengths AB = 5.5 cm, BC = 6 cm, and CA = 7 cm, as well as the perpendicular bisector of side BC, follow these steps:

1. Draw a line segment of length 6 cm. This will represent side BC.
2. At one end of the line segment, mark point B.
3. With B as the center and a radius of 5.5 cm, draw an arc to intersect the line segment BC. Mark this point as A.
4. Measure a distance of 7 cm from point A along the line segment BA. Mark this point as C.
5. Connect points A, B, and C to form triangle ABC.
6. Now, find the midpoint of side BC. This midpoint will be the point where the perpendicular bisector intersects side BC.
7. Draw a perpendicular line to side BC passing through the midpoint of BC. This line is the perpendicular bisector of side BC.

The triangle ABC is now drawn with side lengths AB = 5.5 cm, BC = 6 cm, and CA = 7 cm, and the perpendicular bisector of side BC is also drawn.

To construct the triangle ABC and follow the given instructions, including bisecting side AB at D and drawing a line parallel to BC through D, meeting AC at E, you can use the following steps:

1. Draw a line segment AB to represent side AB of the triangle. Choose any length for AB.

2. Bisect side AB:

   • Use a compass to find the midpoint of AB. Let's call this point D.

3. Draw the line parallel to BC through D:

   • Place the compass on point D and adjust its width to any convenient length.
   • Draw two arcs intersecting sides AC and BC of the triangle at points E and F, respectively.
   • Draw a line passing through points D and E. This line should be parallel to side BC.

4. Label the intersection point of the parallel line and side AC as E.

5. Measure the lengths AE and EC using a ruler.

Now you have constructed triangle ABC, bisected side AB at D, and drawn a line parallel to BC through D, meeting AC at E. You can measure the lengths AE and EC using a ruler.

To draw triangle ABC with side lengths AB = 3 cm, BC = 5 cm, and angle B = 70 degrees, follow these steps:

1. Draw a line segment BC of length 5 cm. This will represent side BC.

2. At one end of the line segment BC, mark point B.

3. With B as the center and a radius of 3 cm, draw an arc to intersect the line segment BC. Mark this point as A.

4. Measure an angle of 70 degrees from side BC at point B. You can use a protractor for this.

5. Draw a line segment from point B, making an angle of 70 degrees with side BC. Let the intersection of this line with the arc be point A.

6. Connect points A, B, and C to form triangle ABC.

Now, you have triangle ABC with side lengths AB = 3 cm, BC = 5 cm, and angle B = 70 degrees.

To draw triangle ABC with angle A = 70 degrees, AB = 4 cm, and AC = 6 cm, follow these steps:

1. Draw a line segment AB of length 4 cm. This will represent side AB.

2. At one end of the line segment AB, mark point A.

3. Measure an angle of 70 degrees from side AB at point A. You can use a protractor for this.

4. Draw a line segment from point A, making an angle of 70 degrees with side AB. Let the intersection of this line with side AC be point C.

5. Measure a length of 6 cm along the line segment AC from point A. Mark this point as point C.

6. Connect points A, B, and C to form triangle ABC.

Now, to measure the length of side BC, use a ruler to measure the distance between points B and C.