jordanrodriguez81 jordanrodriguez81

09-12-2019
Mathematics

contestada

The radius of a circle is doubled. How does the area change?

Respuesta :

jimrgrant1 jimrgrant1

09-12-2019

Answer:

Area increases by a factor of 4

Step-by-step explanation:

The area (A) of a circle is calculated as

A = πr²

If the radius is doubled, that is r = 2r, then

A = π(2r)² = 4πr²

Hence the area has been increased by a factor of 4

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