David had a tile that was an equilateral triangle. He concluded that each angle of the triangle measured 60°. Which of the following statements BEST justifies David’s conclusion? A. All acute angles have a measure of 60 degrees
b. every equilateral triangle is also an isosceles triangle
c. The sum of the measures of the angles in a triangle is 180 degrees, and the three angles are congruent
D. The measure of an exterior angle of a triangle is the sum of measures of its two remote interior angles

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step-by-step explanation:

well the answer to that is xoxoxo

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