Answer: Area is = to 1017.88 Circumference is = to 113.1 Step-by-step explanation: To find the area of a circle use the formula A=πr2 So . . . A = π18² A = π324 A = 1017.88 To find the circumfrence of a circle use formula C=2πr So . . . C = 2π18 C= 113.1 Hope this helps Brainliest please!