Need help asap. I don’t understand this. Plz be serious and know what to do.

Mathematics

1 answer:

aksik [14]2 years ago

7 0

Answer:

63 cm²

Step-by-step explanation:

To find the surface area, we need to find the area of all the squares and triangles available.

<u>Solution:</u>

Area of triangle = 1/2 x base x altitude
=> 1/2 x 3 x 9
=> 27/2 cm²
=> 13.5 cm²

Now, multiply the area of the triangle by 4.

=> 13.5 x 4
=> 54 cm²

Now, let's find the area of the square.

=> Area of square = side²
=> Area of square = 3²
=> Area of square = 9 cm²

Now, add the area of the triangles and the squares.

=> 54 + 9
=> 63 cm²

Hence, the surface area of the pyramid is 63 cm².

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