1. what is the perimeter of △abc with vertices at a(−11, 4) , b(−7, 8) , and c (−4, 4)? round only your final answer to the nearest tenth. 2. rectangle wxyz has vertices at w(−6, 1) , x(−1, 6) , y(2, 3) , and z(−3, −2) . what are the perimeter of the rectangle? round only your final answer to the nearest tenth, if necessary.

ANSWER TO QUESTION 1

We use the distance formula,



to find the length of each side and add them to find the total distance around the triangle.

A(−11, 4) , B(−7, 8) , and C (−4, 4) are the vertices of the triangle.



























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ANSWER TO QUESTION 2

For the rectangle the perimeter is given by the formula,



we use the distance formula again to find the length and width of the rectangle.

W(−6, 1) , X(−1, 6) , Y(2, 3) , and Z(−3, −2) are the vertices of the rectangle.













This the length of the rectangle.

We now find the width.