If it's a regular octahedron, then you can calculate it using the formula
where
is the length of the edge.
If it's not regular, you have to calculate the area of each side individually.
Step-by-step explanation:
the third of 7 consecutive numbers is 12.
so, this looks like
..., ..., 12, ..., ..., ..., ...
that means the numbers have to be
10, 11, 12, 13, 14, 15, 16
the sum is then
16+10 + 15+11 + 14+12 + 13 = 3×26 + 13 = 91
437 and 250 and 422 there you goooooo
The formula for the area of a circle is PI r (square) or 3.14 * r^2 or 3.14 * r * r, all are the same thing. For 49, they give you the radius is 6.2 ft.
49.
3.14 * 6.2 * 6.2 = 120.7 ft(squared)
50.
diameter = 11 yards
Means: Radius = 5.5 yards (radius is half of a diameter)
3.14 * 5.5 * 5.5 = 94.99 yards ft(squared)
Now just round these values to the nearest tenth if not done so already. 94.99 will be 95.0 rounded to the nearest tenth.
The ratio of 7 to 3.
The ratio as a fraction would be:
