Which degree goes to the shape?
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So, what's the slope of y = 2x - 4? well, is in slope-intercept form, thus
, so is 2.
now, a perpendicular line to that, will have a negative reciprocal slope to it, thus
so, that's its slope of that perpendicular line.
but we also know that it runs through (5,r) and (2,3), so that slope is equal to -1/2
now, a perpendicular line to that, will have a negative reciprocal slope to it, thus
so, that's its slope of that perpendicular line.
but we also know that it runs through (5,r) and (2,3), so that slope is equal to -1/2
This is 7 * 4 = 28
because every floor plan has two exteriors, and two <span>types of flooring</span>
because every floor plan has two exteriors, and two <span>types of flooring</span>
Recall the double/half angle formulas:
We're given , and since
is between π/2 and π, we expect
to be negative. So from the Pythagorean identity, we find
Also, we know will fall between π/4 and π/2, so both
and
will be positive. Then we find
and it follows that