Answer:
perimeter: 36
area: i dont know sorry
Step-by-step explanation:
4(8-x)+36=102-6x
Expand by using distributive property
32 - 4x + 36 = 102 - 6x
Combine like terms
-4x + 68 = 102 - 6x
Add 6x to both sides
2x + 68 = 102
Subtract 68 from both sides
2x = 34
Divide both sides by 2
x = 17
Answer
x = 17
Answer:
each of the eight angles measures 45 degrees
Step-by-step explanation:
The sum of all exterior angles of any polygon always measures 360 degrees.
If it's 'regular' then all angles have the same measures.
If it's an octagon, then it has 8 sides.
360 divided by 8 = 45
Surface area will consist of:
2 triangles, 3 rectangles:
Solving for triangles:
A=1/2bh
A=1/2(120)
A=60
60*2 gives us the surface area of both triangular sides.
Solve for rectangles:
(17*20)+(8*20)+(15*20)
(340)+(160)+(300)
(800)
800+120=920
The surface area of the prism is 920 square feet