1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
marshall27 [118]
2 years ago
10

Can someone explain the formula for the area of a pentagon, and the formula for the length of an arc of a portion of a circle? P

lease help.
Mathematics
1 answer:
RSB [31]2 years ago
4 0
So a pentagon is constructed by five identical triangles, that's why you can find the area of one triangle and multiply it with 5:
A_pentagon=A_triangle*5
To find the area of a triangle you must use tangens.
You can watch this for more on that on youtube. 

For the length of an arc or a portion of a circle you can find it using: 
arc lenght = 2π*r(A/360), where A=angle. 
So if you know radians, then 2π is a whole circle. And to calculate for the specific circle you have to use the radius. That's why you multiply with radius, which is the only difference between any two different circles. you then multiply with the  part of the circle that you want to find the lenght for, which is A/360 (because there are 360° in a circle)

I hope that helped. 


You might be interested in
How big will the Universe be in 999 nonillion years?
Andru [333]

Answer:

it will be 5x the size it is now

Step-by-step explanation:

veiwer discrection is advised

7 0
3 years ago
A sports tournament has d teams. Each team has 15 players. Using d, write an expression for the total number of players in the t
fredd [130]

Answer:

d x 15=total players.

Step-by-step explanation:

dx15=total number of players in the tournament.

6 0
3 years ago
Read 2 more answers
Holly and Tamar completed the work in the table to determine if a triangle with side lengths of 40, 42, and 58 is a right triang
PIT_PIT [208]
Simple Pythagorean theorem, And if you double check Tamara's work she is correct. Therefor B is the correct answer. 
3 0
3 years ago
Read 2 more answers
A line that includes the point (0,0) has a slope of -9. What is its equation in slope-intercept
ikadub [295]
Y=-9x because y=mx+b is the formula so plug in the slope, m(-9) and the x-intercept, x(0)
3 0
3 years ago
Find the area of the circle. Round your answer to the nearest hundredth 3in
FrozenT [24]

Answer:

28.26 square inches

Step-by-step explanation:

Formula for area of a circle:

A=\pi r^2

Radius is 3.

A= \pi (3)^2\\A=\pi 9

Use 3.14 for pi:

A = 3.14 * 9 = 28.26\\A=28.26

The area should be 28.26 square inches.

4 0
3 years ago
Other questions:
  • Which is the best estimate of the total number and then 5 and 6 as well please this is to hard
    13·1 answer
  • If a tank holds 4500 gallons of water, which drains from the bottom of the tank in 50 minutes, then Toricelli's Law gives the vo
    8·1 answer
  • I have to find the area of the shaded region
    11·1 answer
  • What is the median of this data set?
    9·2 answers
  • —-<br> PB. It has endpoints at -2 and 12. What is the coordinate of its midpoint
    10·1 answer
  • Find the sum and express it in its simplest form. (6u-7c-6) + (-2u+4c)
    14·2 answers
  • Find the slope of the line passing through the points (7,-8)<br> and<br> (1, -1).
    12·2 answers
  • B. A window in the room has an actual width of 2.5 feet.
    14·1 answer
  • Movies and More is having a one-day sale on certain movie DVDs and video games. You can buy 3 DVDs and 2 video games for $74. Or
    7·1 answer
  • Would you use SSS or SAS to prove the triangles​ congruent? If there is not enough information to prove the triangles by SSS or​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!