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Andrews [41]
4 years ago
7

Find the measure of x.

Mathematics
1 answer:
Sunny_sXe [5.5K]4 years ago
6 0

Answer:

\large\boxed{x=2\sqrt{181}\approx26.91}

Step-by-step explanation:

If AB is a tangent of a circle, then the angle B is right angle. Therefore the triangle ABC is a rigth triangle.

BC and x are the radius of a circle. Therefore BC = x.

Use the Pythagorean theorem:

BC^2+BA^2=AC^2

We have

BC=x,\ BA=80,\ AC=82

Substitute:

x^2+80^2=82^2

x^2+6400=6724            <em>subtract 6400 from both sides</em>

x^2=724\to x=\sqrt{724}\\\\x=\sqrt{4\cdot181}\\\\x=\sqrt4\cdot\sqrt{181}\\\\x=2\sqrt{181}

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3 years ago
Find the longitude and latitude for the points on the globe with angular coordinates ( θ , ϕ ) = ( π 4 , 11 π 12 ) (θ,ϕ)=(π4,11π
DedPeter [7]

Answer:

For (45,165.02) Latitude and longitude is (45 0' 0",165 1' 12")

Hence latitude and longitude  are 4 degrees 35' 59.94" and 2 degrees 47' 59.994 "

Step-by-step explanation:

Given:

The angular coordinates  of the point on globe as (θ,∅)=(π/4,11π/12)

To find : longitude and latitude for this points:

Solution:

For finding this Longitude and latitude we should convert it into decimal degrees

Given that 1rad =57.295 deg.

we get for

θ=π/4

=3.142/4

=0.7855 *57.295

=45 degrees.

Now for φ=11π/12

=(11*3.142)/12=2.8801*57.295

=165.02 degrees

Now convert in longitude and latitude as ,

as degrees +min/60+seconds/3600

Now latitude =45 degrees

i.e. 45 degrees 0' 0"

And longitude as

165.02 degrees becomes

165 degrees 1' 12".

Hence For the angular co-ordinates (45,165.02)

Longitude and latitude is (45 0' 0",165 1' 12")

Now for the (4.6, 2.8)

we get using same

degrees+min/60+seconds/3600

=4 degrees 35' 59.94"

And for 2.8 means,  (similar to clock analog )

=2 degrees  47' 59.94"

Hence latitude and longitude  are 4 degrees 35' 59.94" and 2 degrees 47' 59.994 "

8 0
4 years ago
What is the sum of the second and fifth square numbers?
LenKa [72]
The second square number is 9 and the fifth is 36
The sum of the numbers is 45
Hope that helps
6 0
3 years ago
Calculate the area of the figure below using the following information:
vekshin1

Answer:

106.5 square units.

Step-by-step explanation:

See the attached diagram.

The pentagon ABCDE consists of three triangles namely Δ ABC, Δ ACD, and Δ ADE when we join the diagonals AC and AD.

So, Area of Pentagon ABCDE = Area of  Δ ABC + Area of Δ ACD + Area of triangle Δ ADE.

⇒ Area of Pentagon ABCDE = (31.8 + 39.2 + 35.5) = 106.5 square units. (Answer)

6 0
4 years ago
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