Akira needs 45 square inches of gold foil to cover the chair free including the bottom
Step-by-step explanation:
Total surface = surface area of the base square + area of 4 triangles
Step 1: The surface area of the base square
surface area of the base = surface area of the square =
where s is the side length
The the surface area of the base = = 9 square inches
Step 2: The surface area of the side triangles
The area of the triangle =
On substituting the values,
The area of the triangle =
The area of the triangle =
The area of the triangle = 9 square inches
Now the area of 4 triangles = 4 x 9 = 36 square inches
Thus the total surface area = 9 + 36 = 45 square inches
