What role did medieval knights have in feudalism? They protected nobles and their land,

They protected serts from their lords,

They protected the king from nobles,

They protected nobles from angry serfs.

C. They protected the king from nobles.

Explanation:

Knights served in the kings army

answer; i believe the correct answer is (the willamete valley);

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