1.1.1 Draw line $$ B C $$ with polnt $$ C $$ on vertical line $$ A F $$, creading $$ A B C=30^{\circ} $$ 1.12 Measure and write down length $$ A C $$

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1. **Draw the Vertical Line and Mark Key Points**  
   - Draw a vertical line and label two points on it, $$ A $$ (lower point) and $$ F $$ (upper point).  
   - Choose any convenient point $$ B $$ that is not collinear with $$ A $$ and $$ F $$.

2. **Construct $$ \angle ABC = 30^\circ $$ and Locate $$ C $$ on $$ AF $$**  
   - Place the protractor’s center at point $$ B $$.  
   - Align the protractor so that one ray passes through point $$ A $$ (that is, the ray $$ BA $$).  
   - From the ray $$ BA $$, mark a $$ 30^\circ $$ angle on the side of $$ B $$ that will intersect the vertical line $$ AF $$.  
   - Draw a ray from $$ B $$ through the $$ 30^\circ $$ mark.  
   - The intersection of this ray with the vertical line $$ AF $$ is point $$ C $$.  
   - At this point, you have $$ \angle ABC = 30^\circ $$.

3. **Measure the Length $$ AC $$**  
   - Using a ruler, measure the distance between point $$ A $$ and point $$ C $$.  
   - Write down the measured length.

For example, if your ruler shows that $$ AC $$ measures $$ 5.2 $$ centimeters, then  
$$
AC = 5.2\text{ cm}.
$$

Note that the actual value may vary depending on your construction scale.
1. Draw a vertical line with points $$ A $$ and $$ F $$. 2. Choose point $$ B $$ not on the line. 3. Use a protractor to draw $$ \angle ABC = 30^\circ $$ from point $$ B $$. 4. The intersection of this angle with the vertical line is point $$ C $$. 5. Measure the distance from $$ A $$ to $$ C $$ and record it as $$ AC $$.

1.1.1 Draw line \( B C \) with polnt \( C \) on vertical line \( A F \), creading \( A B C=30^{\circ} \) 1.12 Measure and write down length \( A C \)

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