Hello,
The correct answer is B) 280 in²
= 10( 2 × 9 + 10 )
= 10 (2 × 9 = 18 + 10 = 28)
= 10 × 28 = 280
= 280
Answer: 280 in²
In other words.....
= 10(2*9+10)
= 10(18+10)
= 10*28
= 280
Answer: 280 in²
Hope this helps!!!! (:
The total surface area of the pyramid is 280 inches². The correct option is B, 280 inches².
The area of a 2D form is the amount of space within its perimeter. It is measured in square units such as cm², m², and so on. To find the area of a square formula or another quadrilateral, multiply its length by its width.
The area of a triangle is half the product of the height of the triangle and the base of the triangle. The area of the square is the square of the side of the square.
Given that the length of the side of the square base is 10 inches, while the height of the triangular faces is 9 inches.
The area of the square base pyramid
= Area of 4 triangular faces + Area of the base of the pyramid
= 4(Area of a single triangular face) + Area of the base
= 4(0.5 × 10 inches ×9 inches) + (10 inhces)²
= 4(45 inches²) + 100 inches²
= 180 inches² + 100 inches²
= 280 inches²
Hence, the total surface area of the pyramid is 280 inches².
Learn more about the Area:
https://brainly.com/question/1631786
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