Answer:
Greatest common factor (GCF) of 18 and 24 is 6.
there are 360 degrees in a complete circle
360/18 = 20
so the answer is C
Its A.
because if the base is 13 and 13 and the sides are 10 cm multiply and get A.
For the full circle, Area = pi(r)^2
pi x 1^2 = pi
Semi circle = pi/2 = 1.57 square feet
