How do I solve this problem? : Four rectangle strips of wood, each 30 cm long and 3 cm wide, are arranged to form the outer section of a picture frame, as shown. Determine the area in side the wooden frame.

We haves no idea of the arrangement, especially the corners.

To solve this problem, we need to calculate the area inside the wooden frame.

First, let's visualize the arrangement of the four rectangle strips to form the outer section of the picture frame. Based on the given information, we have four strips, each 30 cm long and 3 cm wide.

Since we are finding the area inside the wooden frame, we need to subtract the area of the inner rectangle (picture or glass area) from the area of the outer rectangle (frame area).

To calculate the outer rectangle's area, we use the formula:

Area = Length x Width

Area of the outer rectangle = 2 x (Length + Width)

Where the length is the total sum of the lengths of the two longer sides, and the width is the sum of the two shorter sides.

In this case, the length of the outer rectangle is 30 + 30 = 60 cm, and the width is 3 + 3 = 6 cm.

Area of the outer rectangle = 2 x (60 cm + 6 cm) = 2 x 66 cm = 132 cm²

Now, let's calculate the area of the inner rectangle.

The length of the inner rectangle (picture or glass area) is obtained by subtracting the width of each strip from the length of the outer rectangle. In this case, each strip has a width of 3 cm, so the length of the inner rectangle is 60 cm - 3 cm - 3 cm - 3 cm - 3 cm = 48 cm.

The width of the inner rectangle is obtained by subtracting the width of one strip from the width of the outer rectangle. In this case, the width of the inner rectangle is 6 cm - 3 cm = 3 cm.

Area of the inner rectangle = Length x Width = 48 cm x 3 cm = 144 cm²

Finally, to find the area inside the wooden frame, we subtract the area of the inner rectangle from the area of the outer rectangle:

Area inside the wooden frame = Area of the outer rectangle - Area of the inner rectangle

Area inside the wooden frame = 132 cm² - 144 cm² = -12 cm²

Since we cannot have a negative area, it means there is an error in the given dimensions or arrangement of the rectangle strips. Double-check the problem description to ensure all measurements and information are correct.