The intersection of math and religion led to what in Egypt?

Ancient Egyptian architectural monuments.  

Explanation:        

Ancient monuments and temples of Egypt constructed with the help of the joining of math and religion. Most buildings created by the use of available of mud-brick and limestone. Ancient Egyptian architecture is known for its temples, pyramids, tombs, palaces, and fortresses. Many of the monuments were in advance by using sophisticated measurements, designs and plans. Religion plays a role in constructing temples, decorations in walls, carved statues, and hieroglyphs (symbols).      

the french gave their support to another tribe during he war.