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3 years ago

How many does this have

Mathematics

2 answers:

e-lub [12.9K]3 years ago

4 0

However many dots there is those are solutions I counted 4.

V125BC [204]3 years ago

3 0

I think 5 then. I also counted 4 (from the dots that connect at the same intersection)

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What is the shaded portion of the circle

blagie [28]

Answer:

$(5\pi-11.6)\ ft^{2}$

Step-by-step explanation:

we know that

The area of the shaded region is equal to the area of the sector minus the area of the triangle

step 1

Find the area of the circle

the area of the circle is equal to

$A=\pi r^{2}$

we have

$r=5\ ft$

substitute

$A=\pi (5)^{2}$

$A=25\pi\ ft^{2}$

step 2

Find the area of the sector

we know that

The area of the circle subtends a central angle of 360 degrees

by proportion find out the area of a sector by a central angle of 72 degrees

$\frac{25\pi}{360}=\frac{x}{72}\\ \\x=72*25\pi /360\\ \\x=5\pi\ ft^{2}$

step 3

Find the area of triangle

The area of the triangle is equal to

$A=\frac{1}{2}(2.9+2.9)(4)= 11.6\ ft^{2}$

step 4

Find the area of the shaded region

Subtract the area of the triangle from the area of the sector

$(5\pi-11.6)\ ft^{2}$

8 0

3 years ago

Gente como resolver problemas sobre sistemas lineares ?? me

Bond [772]

3x+5y=16 is linear equation........

5 0

3 years ago

Figure ABCD is rotated by 180 degrees about the origin in the counterclockwise direction to obtain figure A′B′C′D′:

Gemiola [76]

Answer:

Length of AB = Length of C′D′

Length of CD = Length of B′C′

Step-by-step explanation:

Not sure but I think

8 0

3 years ago

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ra1l [238]

Answer:

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3 years ago

Find the volume of a cone with the radius of radius of 80 and height of 21

RoseWind [281]

Answer:

140672

Step-by-step explanation:

formula for cone volume=pi*r^2*h*1/3

80^2*3.14*21=422016

422016*1/3

=140672

5 0

3 years ago