Cause Effect
 No one is really sure. However people think it was too expensive to continue building ships.
The Ming emperor suddenly halted further construction of ships.
Ming leaders banned ships with more than two masts. There would be no further construction of ships.
 China ended up turning its back on exploration
Ming emperors disallowed foreign exploration.
 
Europeans' textiles and metals were not as well made as Chinese.
 
Trade was controlled by Imperial leaders.
 

Focus Question:
What can modern nations learn from the Ming Dynasty?

Given: ab ≅ cd and ad ≅ bc prove: abcd is a parallelogram. statements reasons 1. ab ≅ cd; ad ≅ bc 1. given 2. ac ≅ ac 2. reflexive property 3. △adc ≅ △cba 3. ? 4. ∠dac ≅ ∠bca; ∠acd ≅ ∠cab 4. cpctc 5. ∠dac and ∠bca are alt. int. ∠s; ∠acd and ∠cab are alt. int. ∠s 5. definition of alternate interior angles 6. ab ∥ cd; ad ∥ bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3? triangle angle sum theorem sas congruency theorem sss congruency theorem cpctc