This figure of this net is called
pyramid
It has 5 faces.

The total surface area is
because ???

Hint: Area of a triangle =bh/2,
What are the base and height of
each of the triangles?

The surface area of the entire pyramid is 40 square units.

The triangles have base lengths of 4 units and heights of 3 units.

Step-by-step explanation:

Step 1:

To calculate the surface area of the pyramid, we must calculate the areas of all the 5 sides.

We divide the pyramid into 1 square and 4 triangles, find the areas individually and then sum them all up to calculate the surface area of the entire pyramid.

Step 2:

There are four triangles with base lengths of 4 units and heights of 3 units. To calculate a triangle's area we multiply with the product of the base length and it's height.

The area of 1 triangle square units.

The area of 4 such triangles square units.

Step 3:

The area of a square is the square of its side length.

The square has a side length of 4 units.

The area of the square base square units.

The surface area of the entire pyramid is the sum of the areas of the 4 triangles and the square.

The surface area of the entire pyramid square units.

The surface area is 40 square units.

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.