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soccerhannah290
31.07.2019 •
Mathematics
Which statements are true about the intersecting planes in the figure below?
1. the two planes intersect at a point.
ii. the planes intersect at a line.
iii. the lines intersect at a point.
iv. the lines are coplanar.
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Ответ:
64π in²
Step-by-step explanation:
The surface area (A) of a sphere is calculated as
A = 4πr² ( r is the radius, and here is 4 ), thus
A = 4π × 4² = 4π × 16 = 64π