Answer:
see explanation
Step-by-step explanation:
A cube has 6 congruent square faces
The area of 1 face = ×
=
Multiply by 6 to obtain surface area of cube
surface area = 6 × =
=
units²
What is the area of a circle with a diameter of 28 inches? Answer in terms of Pi. *
1 answer:
Formula for the area of a circle:
A = πr² (A = Area π(pi) r = radius)
You know:
r = 14 inches So substitute/plug it into the equation
[Radius is (half) of the diameter. The diameter is 28, so half of 28 = 14]
A = πr² Plug in 14 into "r" since r = 14
A = π(14)² Find 14² --> 14 x 14 = 196
A = 196π in² Your answer is the 4th option
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Step-by-step explanation:
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