Answer:1. ∠1 and ∠3 are vertical angles. 1. Given
2. ∠1 and ∠2 form a linear pair. VAT
∠2 and ∠3 form a linear pair. 2. Definition of linear pair
3. ∠1 and ∠2 are supplementary. Substitution Property
∠2 and ∠3 are supplementary. SAME SIDE INTERIOR ANGLES THEOREM
3. VERTICAL ANGLES THEOREM
4. m∠1 + m∠2 = 180˚ SAME SIDE INTERIOR ANGLES THEOREM
m∠2 + m∠3 = 180˚ SAME SIDE INTERIOR ANGLES THEOREM
5. m∠1 + m∠2 = m∠2 + m∠3
(SUBSTITUTION PROPERTY)
6. m∠1 = m∠3 opposite angles
7. ∠1 ≅ ∠3 7. Given
Explanation:
23 countries in North America have a border with South America.
Explanation:
- It has an overland border with the continent of South America which runs along the Panama-Colombia state boundary. In total there are 23officially recognized sovereign states in North America.
- At some point, the boundary between North America and South America falls on Panama's Isthmus.
- The most famous demarcation in atlases and other documents parallels the dividing watershed of the Darién Mountains along the Colombia-Panama border where the isthmus meets the continent of South America.
I believe it's Canada. It seems the closest geographically anyway.
Hope this helped ☺️ ☺️
It’s C. Action of convergent plate boundaries