I draw the circumference of the orange and fill the orange peel into the circumference and then I get the result that the peel can fill 4 circumference. In this activity I learn the formula for the surface area of the sphere. Read more
I draw the circumference of the orange and fill the orange peel into the circumference and then I get the result that the peel can fill 4 circumference. In this activity I learn the formula for the surface area of the sphere. Read more