Which triangles are similar?
A. 12 6
B. 8 16
C. 8 4
D. 3 6

Sides: a = 12   b = 12   c = 6

Area: T = 34.857

Perimeter: p = 30

Semiperimeter: s = 15

Angle ∠ A = α = 75.522° = 75°31'21″ = 1.318 rad

Angle ∠ B = β = 75.522° = 75°31'21″ = 1.318 rad

Angle ∠ C = γ = 28.955° = 28°57'18″ = 0.505 rad

Height: ha = 5.809

Height: hb = 5.809

Height: hc = 11.619

Median: ma = 7.348

Median: mb = 7.348

Median: mc = 11.619

Inradius: r = 2.324

Circumradius: R = 6.197

Vertex coordinates: A[6; 0] B[0; 0] C[3; 11.619]

Centroid: CG[3; 3.873]

Coordinates of the circumscribed circle: U[3; 5.422]

Coordinates of the inscribed circle: I[3; 2.324]

Exterior (or external, outer) angles of the triangle:

∠ A' = α' = 104.478° = 104°28'39″ = 1.318 rad

∠ B' = β' = 104.478° = 104°28'39″ = 1.318 rad

∠ C' = γ' = 151.045° = 151°2'42″ = 0.505 rad

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

mark brainliest!