We apply our knowledge in variation.
The solution can be seen in the photo
Answer:
64 × pi m²
Step-by-step explanation:
the formulas needed for the surface area of a cone are :
base area plus the "mantle", the lateral "wall" around it.
the base area is a circle.
so, that formula is Ac = pi×r²
the "wall" formula is Aw = pi×r×s
r = radius
s = slant height = 12
the formula for the surface area of a sphere is
As = 4×pi×r²
we know now, that both surface areas are the same, and also the radius is the same for both objects.
Ac + Aw = As
pi×r² + 12×pi×r = 4×pi×r²
=>
12×pi×r = 3×pi×r²
12×pi = 3×pi×r
12 = 3×r
r = 4 m
now, we only need to use this value of r in our formulas for surface areas, like for the sphere :
4×pi×r² = 4×pi×4² = 4³×pi = 64×pi
Answer:
The value of 
Step-by-step explanation:
Let's recall the the formula for volume of a pyramid.
Volume of a Pyramid 
....equation 
where 
and 
Now we have been given the values of 
and 
and have to find the value of 
Plugging the values of and in equation
Now we can also check our previous results.
So, our final answer is 
Answer:
the answer is that both x and y are acute
