Segments \overline{AB} AB start overline, A, B, end overline and \overline{CD} CD start overline, C, D, end overline have no angles with the same measurement, so they are not congruent." What error did Vinay make in his conclusion? Choose 1 Choose 1 (Choice A) A The segments are mapped onto each other, so they are congruent. (Choice B) B The segments are not congruent, because no transformations were used. (Choice C) C There is no error. This is a correct conclusion.

c-   36

taxicab circle radius 9 has 4(9) = 36 points

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81

the answer is 15 to your question