Are the following relations, functions, yes or no? 1. { (1, 4), (2, 5), (3, 6), (1, 6)} 2. { (1, 3), (2, 3), (4, 3), (5, 3)} 3. {(1, 1), (2, 1), (4, 5), (5, 12), (2, 2)}
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step-by-step explanation:

18 units²

step-by-step explanation:

first let's find altitude bd using the distance formula

d = √((y₂ - y₁)² + (x₂ - x₁)²)

bd = √((0 - -3)² + (0 - 3)²)

bd = √18

given the placement of points a and c, we can denote that point d bisects segment ac.

we will call ac the base.

using the distance formula

ac = √((0 - 6)² + (-6 - 0)²)

ac = √72

knowing our base and our height, we can plug these into our triangle area formula

area = (b * h)/2

area = (√18 * √72) / 2

area = (√1296) / 2

area = 36 / 2

area = 18 units²