given:m//n & g//h

Prove angle 4 is congrunt to angle 16.
I have no idea how to do proofs..my teacher is really bad at explaining things.

you have to start by writing the given

To prove that angle 4 is congruent to angle 16, we need to use the given information that m//n and g//h. Here's a step-by-step approach to prove this statement:

Step 1: Identify the corresponding angles.
- Angle 4 and angle 16 are both alternate interior angles.
- Angle 4 corresponds to angle g, and angle 16 corresponds to angle m.

Step 2: Understand parallel lines.
- When two lines are parallel, the alternate interior angles are congruent.
- Therefore, angle g is congruent to angle m.

Step 3: Use the transitive property of congruence.
- Since angle 4 corresponds to angle g, and angle g is congruent to angle m, we can use the transitive property to conclude that angle 4 is congruent to angle 16.
- This means that angle 4 is congruent to angle 16.

Note: This proof assumes that the lines m, n, g, and h are all parallel. If you have additional givens or information about the lines, please include them for a more detailed proof.