tan A should be the corner try work out work out:

first and then add all the others (B=90)
Explanation:
A and C should be the same
Answer:
THE ANSWER IS D NO NEED TO EXPLAIN
<h2><u>Answer:</u></h2>
Mongolian general and statesman Kublai Khan was the grandson of Genghis Khan. He vanquished China, establishing and turning into the primary sovereign of the nation's Yuan Dynasty.
Kublai Khan's most noteworthy accomplishment was turning into the main Mongolian leader of a brought together China, crushing the Song Dynasty and building up a capital at advanced Beijing. His Yuan Dynasty (1279– 1368) included religious resistance (aside from Daoism), logical headways, and a paper money upheld by gold stores.