What is the measure of Angle P Q R?

Triangle P Q R. Angle R is 51 degrees. The lines of sides Q P and R P extend to form exterior angle at P of 74 degrees.

51 degrees

55 degrees

74 degrees

78 degrees

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

2 1/2 feet

step-by-step explanation: