Complex Construction 85F1E3

1. You asked for complex construction problems to practice for your local O-Level exam. 2. Construction problems typically involve geometric constructions using compass and straightedge. 3. Since you requested problems, here is one example: **Problem:** Construct a triangle given the base length $AB = 7$ cm, the angle at $A$ is $60^\circ$, and the altitude from $C$ to $AB$ is $5$ cm. 4. **Steps to solve:** 1. Draw the base $AB$ of length $7$ cm. 2. At point $A$, construct an angle of $60^\circ$ using a protractor or compass. 3. From $AB$, draw a perpendicular line at the point where the altitude from $C$ will meet $AB$. 4. Mark the altitude length $5$ cm on this perpendicular line. 5. Connect the point at the altitude to $A$ and $B$ to form triangle $ABC$. 5. This problem practices angle construction, perpendicular lines, and altitude concepts. If you want more problems or specific types, please specify.