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
Galina-37 [17]
3 years ago
12

What’s the answer?and how do you get it

Mathematics
1 answer:
Kay [80]3 years ago
7 0

the solid is made up of 2 regular octagons, 8 sides, joined up by 8 rectangles, one on each side towards the other octagonal face.

from the figure, we can see that the apothem is 5 for the octagons, and since each side is 3 cm long, the perimeter of one octagon is 3*8 = 24.

the standing up sides are simply rectangles of 8x3.

if we can just get the area of all those ten figures, and sum them up, that'd be the area of the solid.

\bf \textit{area of a regular polygon}\\\\ A=\cfrac{1}{2}ap~~ \begin{cases} a=apothem\\ p=perimeter\\[-0.5em] \hrulefill\\ a=5\\ p=24 \end{cases}\implies A=\cfrac{1}{2}(5)(24)\implies \stackrel{\textit{just for one octagon}}{A=60} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \stackrel{\textit{two octagon's area}}{2(60)}~~+~~\stackrel{\textit{eight rectangle's area}}{8(3\cdot 8)}\implies 120+192\implies 312

You might be interested in
Which expression is equivalent to 5(4x+3)-2x?a 18x+15b 18x+3c 7x+8d 2x+8
kiruha [24]

Answer:

Which expression is equivalent to 5(4x+3)-2x?a 18x+15b 18x+3c 7x+8d 2x+8

A-18x+15

8 0
2 years ago
Solve using substitution.<br><br> y = –1<br> 2x − y = –1
irakobra [83]
X =1 I had this question
8 0
2 years ago
Read 2 more answers
If you split a right angle with a ray going through the middle of the right angle, the two angles formed will be ______. Select
Tom [10]

Answer:

Complementary

Step-by-step explanation:

To be complementary, your two angles need to add up to 90 degrees

a right triangle is already 90 degrees so if you cut it through the middle they'd form complementary angles

8 0
3 years ago
Read 2 more answers
Mhanifa please help me with this? I will mark brainliest!
alekssr [168]

Answer:

C. 20

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Write an equation for the both term of the arithmetic sequence 30,26,22,18
balandron [24]

Answer:

I guess it decreases by 4 everytime so -4??? If thats what your asking

Step-by-step explanation:

30,26,22,18,14,10,8,4,-2.

6 0
2 years ago
Other questions:
  • The sum of 3 and x is less than 7.
    9·2 answers
  • Hola guys...Can you plz help me to find the solutions for -3x+y=0 for linear equations in two variables graph... Pleaseee
    10·1 answer
  • PLEASE HURRY!! What are the solutions to the system of equations?
    12·1 answer
  • For each sequence, find a formula for the general term, a_n. for example, answer n ^2 if given the sequence: \lbrace 1, 4, 9, 16
    5·1 answer
  • How can you add eight 8's to get the number 1,000? (only use addition) and how did you get this answer
    8·1 answer
  • Which description best describes the association between the years and population in this scatter plot?
    14·1 answer
  • there are 93 calories in a small candy bar.how many calories are there in a half dozen small candy bar?
    11·1 answer
  • Inspect the mathematical expression. 15 times 1/x - 3x
    10·1 answer
  • Help me help me MY EXIT TICKET !!!
    7·1 answer
  • HELPA SAP PLEASE!<br><br> Please check which answer is correct!!!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!