Which unit represents 100 meters A.) hectometer
B.) kilometer
C.) decameter
D.) centimeter

Greetings! Hope this helps!

"Hecto" Is a meaning for 100, So your answer would be A.) Hecotmeter

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step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.