A sphere has a radius of r. What is the area of a cross section taken at a distance of 1/2r from the center of the sphere?
1 answer:
Answer:
D. ¾ πr²
Step-by-step explanation:
If r is the radius of the sphere, and R is the radius of circular cross section, then:
r² = (½ r)² + R²
r² = ¼ r² + R²
¾ r² = R²
So the area of the circular cross section is:
A = πR²
A = ¾ πr²
You might be interested in
Answer: B
Step-by-step explanation: because
Answer: 330
Step-by-step explanation:first you subtract 50 from 120 = 70 then 70 x the number of days which is 4 = 280 + the seashells at the beginning which is 50 = 330.
Answer:
Top stays the same
Middle and bottom switch
Step-by-step explanation:
Answer:
6.113 i believe to be so
Answer:
7 4/6 - 5 5/6 = 1.83 or 1 5/6
Hope This Helps!
