4/14 Surface area of spheres and cylinders

Diameter connect one end of a circle to the other

Radius connects the center of the circle to the edge

Radius is half of the diameter

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​Radius Versus Diameter

Multiple Choice

The radius is ___________ of the diameter?

• one-fourth

• one - half

Multiple Choice

Determine the radius of the penny

• 9.5 mm

• 38 mm

• 19 mm

SA = 2 ( Area of the circle) + (Circumference * height)

SA =(2 x π x r² )+(2 x π x r x h)

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​Surface Area of a Cylinder

Hotspot

Mark the radius of the cylinder

Hotspot

Mark the height of the cylinder

Math Response

Fill the formula $$SA\ =\ 2\times\pi\times r\ \times h\ +\ 2\times\pi\times r^2$$

Using the diagram. Do not simplify

Type answer here

Correct Answer: 2\times\pi\times9\times6+2\times\pi\times9^2

Deg^°

Rad

SA = 4 x π x r²

Surface Area of a Sphere

Math Response

Fill in the formula $$SA\ =\ 4\times\pi\times r^2$$ using the sphere in the picture

Type answer here

Correct Answer: 4\times\pi\times5^2

Deg^°

Rad