The Northern renaissance artist that did not use perspective in his paintings was Albrecht Durer. I hope this answer is useful!
Water color's primary characteristic is its transparency
Warm colours, such as reds, yellows, and oranges
Explanation:
you would either take and add them together to equal 90 or take them separate like for example 4x+1=90
it would be equal to 90 because they are complementary angles which add up to 90
-hope this helps