on a math test, the students are asked to
find the perimeter of rectangle stuv with
vertices s(-6.5, -8.5), t(2.5, -8.5),
u(2.5, 3.5), and v-6.5, 3.5). alberto writes
that the perimeter of the rectangle is
18 units. is he correct? explain.

Alberto is incorrect. Perimeter is 42 units.

Step-by-step explanation:

Given:

The vertices of the triangle are

Perimeter of a triangle of length and width is given as:

Here,

Distance between two points and is given as:

So, the length ST is,

Width TU is,

Therefore, the perimeter is given as:

Perimeter = units.

Hence, the perimeter written by Alberto is incorrect as perimeter is not 18 units bu 42 units.

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step-by-step explanation:

both equations and proportions are better.