Final answer:
To prove that <1 = <4, use the angle addition property and show that their angle measures add up to a common angle.
Step-by-step explanation:
To prove that <1 = <4, we need to show that their angle measures are equal. Here's how we can prove it:
- Start with the given information: 1 + = 1; 2
- Based on the angle addition property, we know that two angles that add up to another angle are equal to each other.
- In this case, <1 and <4 are angles that add up to a common angle, so they must be equal.
- Therefore, we have proved that <1 = <4.