Which of these describes a unique polygon? A. A triangle with angles 30 degrees, 50 degrees and 100 degrees B. A quadrilateral with each side length 5 cm C. A triangle with side lengths 6cm, 7 cm, and 8 cm D. A triangle with side lengths 4 cm and 5 cm and a 50 degree angle

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Step-by-step explanation:

THE ANSWER IS

I GUESS C ) A TRIANGLE WITH SIDE LENGTHS 6CM ,7CM AND CM . or D ) A triangle with side lengths 4 cm and 5 cm and a 50 degree

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option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.