Euler's formula for a polyhedron is given by:

Make E, the subject of the formula:

Put F = 20, V = 12, to obtain E,

Therefore, there are 30 edges
10 times 50 equals 500. So 500 stripes on 50 buttons.
Answer:
-12
Step-by-step explanation:
120-108 = -12
All you have to do is find the area of the flower bed if it was a circle using (pi)r^2 and then divide by 2,
d=2r 3=2r, r=1.5
the area of the circular flower bed is (pi)(1.5)^2
Semicircular : [ (pi)(1.5)^2 ] / 2
This, rounded to the nearest decimal place is 3.5m^2
Answer:
11
Step-by-step explanation:
Sophia can only have 11 guest max at the retirement party if she can only afford to spend $35.
Given: $2 cost of party
Needed: How many guests
$3 per guests multiplied by 11 guests is $33
add that to the original (given) cost of party the total is
$35
3 times 11=33
33+2=35