Answer:
3.14
Step-by-step explanation:
The sum of all of the exterior angles of any regular polygon is 360 (I'm assuming by decagon you mean a regular dodecagon).
Because the total has to be 360, and a decagon has 10 sides, you divide 360 by 10 to get each exterior angle.
360 ÷ 10 = 36, so each exterior angle of a decagon is 36 degrees.
Answer:
3 is 75
4 is 124
5 is 61
Step-by-step explanation:
for number 4 angles 6 and 8 are supplementary so they add up to equal 180
if they said that 6=56 then we we subtract 56 from 180
180-56=124 so angle 8 equals 124
for number 5 angles 3 and 5 are also supplementary so the values combined will ad up to equal 180. If they say that angle 5 is equal to 119 then all we have to do to get the value of angle 3 is subtract 119 from 180
180-119-61 so angle 3 equals 61
hope this helps :D
Answer:
r = 8
Step-by-step explanation:
Given that M is directly proportional to r² then the equation relating them is
M = kr² ← k is the constant of proportionality
To find k use the condition when r = 2 , M = 14
k = 
=
= 
M = r² ← equation of proportion
When M = 224, then
224 =r² ← multiply both sides by 2
7r² = 448 ( divide both sides by 7 )
r² = 64 ( take the square root of both sides )
r = 
= 8
have wonderful day
A^2 + b^2 = c^2
8^2 + b^2 = 12^2
64 + b^2 = 144
b^2 = 144 - 64
b^2 = 80
b = sqrt 80
b = 8.9 ft <===
