Why are corresponding exterior angles of similar triangles congruent? because the sum of the measures of the interior angles of a triangle always equal 90°, so the sum of the measures of the exterior angles must always be the same

B
because the sum of the measures of the interior angles of a triangle always equal 180°, so the sum of the measures of the exterior angles must always be the same

C
because corresponding interior angles are congruent, and the sum of the measures of an interior angle and an adjacent exterior angle always equals 90°

D
because corresponding interior angles are congruent, and the sum of the measures of an interior angle and an adjacent exterior angle always equals 180°

If two pairs of corresponding angles in a pair of triangles are congruent, then the triangles are similar. We know this because if two angle pairs are the same, then the third pair must also be equal. ... Thus, they always form similar triangles.

answer: finding the extract measurements and knowing the points

step-by-step explanation:

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: