A rectangular mural measures 234 inches by 245 inches. Rhiannon creates a new mural that is 33 inches longer.

What is the perimeter of Rhiannon's new mural?
inch(es)

The length of Rhiannon's new mural is 234 + 33 = <<234+33=267>>267 inches.

The width remains the same at 245 inches.
The perimeter of the new mural is calculated as: 2 * (length + width) = 2 * (267 + 245) = <<2*(267+245)=1024>>1024 inches. Answer: \boxed{1024}.

A rectangular mural measures 890 centimeters by 2891 centimeters. Hailey creates a new mural that is 66 centimeters longer.

What is the perimeter of Hailey's new mural? 9
centimeter(s)

The length of Hailey's new mural is 890 + 66 = 956 centimeters.

The width remains the same at 2891 centimeters.
The perimeter of the new mural is calculated as: 2 * (length + width) = 2 * (956 + 2891) = 2 * 3847 = 7694 centimeters. Answer: \boxed{7694}.

To find the perimeter of Rhiannon's new mural, we need to find the sum of all the sides of the mural.

The original mural measures 234 inches by 245 inches. Let's call the length of the new mural "L".

Since the new mural is 33 inches longer, the length of the new mural is the length of the original mural plus 33 inches:

L = 234 inches + 33 inches

L = 267 inches

The width of the new mural remains the same as the original mural, which is 245 inches.

Now, we can calculate the perimeter of the new mural by adding all four sides:

Perimeter = 2(L + W)

Perimeter = 2(267 inches + 245 inches)

Perimeter = 2(512 inches)

Perimeter = 1024 inches

Therefore, the perimeter of Rhiannon's new mural is 1024 inches.