In the diagram below of isosceles ABC, the measure of vertex angle B is 80°. If AC extends to
point D, what is mZBCD?
B
80°
D
A
с

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answer: .75 km

step-by-step explanation:

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

actually your concept is wrong

step-by-step explanation:

150% of x =300

150x=300×100

x=(300×100)÷150

x=200