Step-by-step explanation: In order to find out the radius you first need to find out the diameter. Diameter times pie or 3.14 equals the area. So, if the area is 12.4 you need to divide 12.4 by 3.14 which gives you 3.94 which rounds up to 4. The radius is half of the diameter so divide 4 by 2 to get 2
So for number 2 i am 100% on which the area of the triangle is 6. and then 1 i think not 100% sure is an acute angle again not 100% then 3. it don't make sense to me so idk about that 1 srry. ~Good Luck~
