Answer:
Area of the remaining board = 32 square feet .
Explanation:
Given : A triangle is cut out of a square whose side length is 8 feet.
To find : What will be the approximate area, in square feet, of the remaining board.
Solution : We have given that square side length = 8 feet.
A triangle is cut out of a square.
Then, base of triangle is 8 feet.
Height = 8 feet ( same as the side of square )
Area of triangle =
.
Area of triangle =
.
Area of triangle = 32 square feet.
Area of square = side * side .
Area of square = 8 *8
Area of square = 64 square feet.
Area of the remaining board = Area of square - Area of triangle.
Area of the remaining board = 64 - 32.
Area of the remaining board = 32 square feet .
Therefore, Area of the remaining board = 32 square feet .