Answer: the surface are of the pyramid is 240m²
Explanation:
This pyramid is made of 5 sides, 4 triangles with a height of 7 and a base of 10, and a square with a side length of 10.
First, calculate the area of the square: 10 * 10 = 100.
Then calculate the area of the triangles: 1/2 * 10 * 7 = 35. Then, multiply 35 by 4 because there are 4 triangles to get 140.
Then add 100+140 to get that the surface are of the pyramid is 240m²
Hope it helps <3