The length of a rectangle is six times its width. If the width of the rectangle
is a in, write a simplified expression for the perimeter of the rectangle.

sine

step-by-step explanation:

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.

answer is  

a.

7 in. x 11 in.

hope you get this right.