+655 If by surfaces you mean area, here you go:
For the first shape, the area is:
17 * 15 which is 255.
For the second shape, we first need to find the height.
To find the height we can use the Pythagorean theorem.
5^2 - 3^2 = x^2 —————> x = 4.
The area is 5 *4 ÷ 2 which also is 10.
The area for the third shape is:
17 *18÷2 which is 153.
To find the area for the final shape, we also need to find the height using the Pythagorean theorem.
13^2 - 5^2 = x^2 ——————> x = 12
7*12 = 84.
The area of the shapes in order is:
225, 10, 153, and 84.
