Answer:
ANSWER:
78.5 dm²
FORMULA:
A = πr²
MEANINGS:
A means area
π means pi or 3.14 (rounded)
r means radius
HOW TO CHANGE DIAMETER INTO RADIUS TO FIND THE AREA OF A CIRCLE?:
just divide the diameter by two to get the radius.
FIRST LET'S SOLVE FOR THE RADIUS:
use the formula r = d/2
given: diameter of 10 dm
solve for the radius.
r = d/2
r = 10/2 or 10 ÷ 2
r = 5 dm
SOLUTION:
A = πr²
A = (3.14)(5 dm)²
A = (3.14)(25 dm²)
A = 78.5 dm²
therefore the area of the circle is
78.5 dm².
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