**Part a)**

The area of a circle is πr2. Define r as 5, and then find the area of a circle.

**Matlab:**

r=5;

A=pi*(r^2)

A =

78.5398

**Part b)**

The surface area of a sphere is 4πr2. Find the surface area of a sphere with a radius of 10 ft

**Matlab:**

r=10;

A = (4*pi*(r^2))

A =

1.2566e+003

**Part c)**

The volume of a sphere is 4/3 πr3. Find the volume of a sphere with a radius of 2 ft

**Matlab:**

r = 2;

V = ((4/3)*pi*(r^3))

V =

33.5103

**Part d)**

The volume of a cylinder is πr2 h. Define r as 3 and h as the matrix

h = [1, 5, 12]

Find the volume of the cylinders

**Matlab:**

r = 3;

h = [1, 5, 12];

V = (pi*(r^2)*h)

V =

28.2743 141.3717 339.2920

**Part e)**

The area of a triangle is ½ bh, where b is the base and h is the height. Define the base as the matrix

b = [2, 4, 6]

and the height as 12, and find the area of the triangles

**Matlab:**

b = [2, 4, 6];

h = 12;

A = ((1/2)*b*h)

A =

12 24 36