Construct a triangle PQR in which QR = 4.8 cm, ∠Q = 45° and ∠R = 55°.

We have been given two angles and one side of triangle ABC.

Steps of construction for this case would be:

1. Draw a line segment sufficiently long using a ruler.

2. Locate points Q and R such that QR = 4.8 cm, on the previously drawn line segment using a ruler.

3. Construct a line segment QX such that ∠XQR = 45° using a compass; use protractor to measure 45°.

4. Construct another line segment RY such that ∠YRQ = 55° using a compass; use protractor to measure 55°.

5. Use these extended line segments QX and RY to intersect at point P.

Thus, PQR is the required triangle.