Answer:
C. 15.6
Explanation:
Perimeter of WXYZ = WX + XY + YZ + ZW
Use the distance formula,
to calculate the length of each segment.
✔️Distance between W(-1, 1) and X(1, 2):
Let,
![W(-1, 1) = (x_1, y_1)](https://img.qammunity.org/2022/formulas/mathematics/college/51qkon9mcw7ucwkovy0ox2swje6k1zcl7b.png)
![X(1, 2) = (x_2, y_2)](https://img.qammunity.org/2022/formulas/mathematics/college/ocwdfiae79jxzhz0ak6bycoj5eg6l6c54t.png)
Plug in the values
![WX = √((1 - (-1))^2 + (2 - 1)^2)](https://img.qammunity.org/2022/formulas/mathematics/college/dkkr7o4c0qjo2jopx5ja829vukf9xr0lac.png)
![WX = √((2)^2 + (1)^2)](https://img.qammunity.org/2022/formulas/mathematics/college/gcfkrxumynfljfg0ywbwsb71y7wvlacqp5.png)
![WX = √(4 + 1)](https://img.qammunity.org/2022/formulas/mathematics/college/jofdfb866dx8bjf6eqknanimt8eojppq9a.png)
![WX = √(5)](https://img.qammunity.org/2022/formulas/mathematics/college/xl3yi7vz2jgnyxx1xby5qjxt4j0aipbdl5.png)
![WX = 2.24](https://img.qammunity.org/2022/formulas/mathematics/college/p7e7vsz20abtlsndujh84w4rca3bro0384.png)
✔️Distance between X(1, 2) and Y(2, -4)
Let,
![X(1, 2) = (x_1, y_1)](https://img.qammunity.org/2022/formulas/mathematics/college/mu4dxeg31c5u5hfgy0tutbznzqnja2a787.png)
![Y(2, -4) = (x_2, y_2)](https://img.qammunity.org/2022/formulas/mathematics/college/5h2b9lbsgp8u8win0an9s5px94kclhgm84.png)
Plug in the values
![XY = √((2 - 1)^2 + (-4 - 2)^2)](https://img.qammunity.org/2022/formulas/mathematics/college/io3dacoja8favo814nohfpx5gsmdxs6ckc.png)
![XY = √((1)^2 + (-6)^2)](https://img.qammunity.org/2022/formulas/mathematics/college/vwrwzb0zdlzx22lr3g3o96wsrshsgnec2m.png)
![XY = √(1 + 36)](https://img.qammunity.org/2022/formulas/mathematics/college/aaqkj4351dwmmtopdbteabb37wai0q9y06.png)
![XY = √(37)](https://img.qammunity.org/2022/formulas/mathematics/college/en34jqi0g6o9putwhqkyg1eufsfni9swlk.png)
![XY = 6.08](https://img.qammunity.org/2022/formulas/mathematics/college/92op672aadognj8t8taurmad6beqpu524n.png)
✔️Distance between Y(2, -4) and Z(-2, -1)
Let,
![Y(2, -4) = (x_1, y_1)](https://img.qammunity.org/2022/formulas/mathematics/college/8qz3otzsh4v82x6mra6kwip2rqp4vh26v2.png)
![Z(-2, -1) = (x_2, y_2)](https://img.qammunity.org/2022/formulas/mathematics/college/961t02h7an95woqhrd1lf7vf7jv15e68k2.png)
Plug in the values
![YZ = √((-2 - 2)^2 + (-1 -(-4))^2)](https://img.qammunity.org/2022/formulas/mathematics/college/ahque7eh64fvy3zzy6l8d1bzdgssidnmfb.png)
![YZ = √((-4)^2 + (3)^2)](https://img.qammunity.org/2022/formulas/mathematics/college/xwahk5bbam34hqp1jnbj31nd5b02m6ywi2.png)
![YZ = √(16 + 9)](https://img.qammunity.org/2022/formulas/mathematics/college/oguscvizk3abv7m565427ymkn8t65417gb.png)
![YZ = √(25)](https://img.qammunity.org/2022/formulas/mathematics/college/2m3mlkwyjnru8bpsxbl6dosctkqy3aveui.png)
![YZ = 5](https://img.qammunity.org/2022/formulas/mathematics/college/e4njd8s49do17grxnmwdobil9qbfluj8fj.png)
✔️Distance between Z(-2, -1) and W(-1, 1)
Let,
![Z(-2, -1) = (x_1, y_1)](https://img.qammunity.org/2022/formulas/mathematics/college/8o8nq9vff385nq9ocy9h1rswfqptb0cwgc.png)
![W(-1, 1) = (x_2, y_2)](https://img.qammunity.org/2022/formulas/mathematics/college/fng3trucsmcide0b8orz643fmf33jtwf4z.png)
Plug in the values
![ZW = √((-1 -(-2))^2 + (1 - (-1))^2)](https://img.qammunity.org/2022/formulas/mathematics/college/6vxfdxasct9isxa5dfo7ws8rgugnpg2wga.png)
![ZW = √((1)^2 + (2)^2)](https://img.qammunity.org/2022/formulas/mathematics/college/omgtie116gks3ktog8m8nsxorfih23687q.png)
![ZW = √(1 + 4)](https://img.qammunity.org/2022/formulas/mathematics/college/j0m9dckeqjy5aj5hz5lhoe9wh7play6f5f.png)
![ZW = √(5)](https://img.qammunity.org/2022/formulas/mathematics/college/7yau48ydcg981go23sosrlarn695zion78.png)
![ZW = 2.24](https://img.qammunity.org/2022/formulas/mathematics/college/cdggf3gmd94shkfjnagl430pmmqzocxkwm.png)
✅Perimeter = 2.24 + 6.08 + 5 + 2.24 = 15.56
≈ 15.6