During the middle ages, the greatest religious thinker in the western european form of christianity (roman catholicism) was

St. Thomas Aquinas

Explanation:

 Saint Thomas Aquinas was an Italian philosopher and theologian of the Dominican Order, born in 1225, was considered one of the most influential thinkers of Scholasticism. He combined principles of theology with philosophic thinking. He wrote Summa Theologica, a philosophical work. He was also known as The Doctor of the Church.

there is no chart here so no one can answer this.

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34