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2 years ago

Does anyone know how to do this if so please help immediately!!!

Mathematics

2 answers:

Bezzdna [24]2 years ago

6 0

Answer:

∠LMN = 90°

Step-by-step explanation:

Ordinarily, you would rotate the protractor so the 0° mark lines up with one of the sides of the angle you want to measure. You have not done that here, but you can still find the measure of the angle.

Subtract the smaller scale value from the larger one to find the angle measure:

∠LMN = 180° -90° = 90°

_____

<em>Additional comment</em>

Most physical protractors are marked with two scales. One goes counterclockwise, as this one does. The other goes clockwise. At each point on the scale, the markings total 180°.

tatyana61 [14]2 years ago

5 0

Answer:

90 degrees looks t like the measure of that angle

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Which equation represents a line that is perpendicular to line PQ?

valentinak56 [21]

Answer:

B. y=1/3x+4

Step-by-step explanation:

Hi there!

We are given the line PQ and we want to find the line that is perpendicular to it

Perpendicular lines have slopes that are negative and reciprocal. When they are multiplied together, the result is -1

So first, let's find the slope of the line PQ

The point P is given as (-8, 7) and the point Q is given as (-4, -5)

The formula for the slope calculated from two points is $\frac{y_2-y_1}{x_2-x_1}$ where ( $x_{1}$ $y_1$ ) and ( $x_2$ , $y_2$ ) are points

We have the needed information for the slope, but let's label the values of the points to avoid any confusion

x1=-8

y1=7

x2=-4

y2=-5

Now substitute into the formula (m is the slope, and remember: the formula contains SUBTRACTION):

m= $\frac{(-5-7)}{(-4--8)}$

simplify

m= $\frac{-5-7}{-4+8}$

add

m=-12/4

divide

m=-3

So the slope of the line PQ is -3

As said above, perpendicular lines have slopes that have a product of -1

So to find the slope of the line perpendicular to PQ, use this formula:

-3m=-1

divide both sides by -3

m=1/3

The only line that has a slope of 1/3 is B (y=1/3x+4), so B is the answer.

Hope this helps!

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