2 years ago

The radius of a circle is 4 kilometers. What is the circumference?

Mathematics

1 answer:

zaharov [31]2 years ago

3 0

Answer:

25.12 kilometers

Step-by-step explanation:

$c = 2\pi \: r$

C = 2 × 3.14 × 4

C = 25.12

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lubasha [3.4K]

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3 years ago

Line L passes through the points (1, 1) and (7, 8). What is the slope of a line that is perpendicular to line L?

asambeis [7]

When a line passes through the two points $(x_{1},y_{1}) and (x_{2},y_{2})$ , its slope is given by the formula $m= \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

In this question, a line L passes through the points $(1,1) and (7,8)$

So, its slope is given by $m=\frac{8-1}{7-1}$

$m=\frac{7}{6}$

When two lines are perpendicular, then the product of their slopes is -1.

Since, the slope of the line L is $\frac{7}{6}$ , so the slope of the line which is perpendicular to the given line L is $\frac{-6}{7}$ as the product of $\frac{-6}{7} \times \frac{7}{6}=-1$ .