Work out the area of a circle with diameteer 1.8cm

Question

asked Jun 14, 2023 41.6k views

1 Answer

Matthias Bruns · Answer 1 · 2023-06-20T22:24:42+0000

RHE FORMULA TO CALCULATE THE ARE OF A CIRCLE IS

$a = \pi {r}^(2)$

NOTE WE ARE ONLY GIVEN THE DIAMETER BUT IT CAN HELP US FIND THE RADIUS FOR WE KNOW THAT TWICE THE RADIUS IS THE THE DIAMETER

$2r = d \\2 r = 1.8 \\ (2r)/(2) = (1.8)/(2) \\ r = 0.9cm$

MEANING THE AREA WILL BE

$a = \pi {(0.9)}^(2) \\ a = 2.54 {cm}^(2)$

NOTE UNITS OF MEASUREMENTS ARE IMPORTANT