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Find the perimeter of this semi-circle with radius, r = 45 cm.  Give your answer rounded to 1 DP.

 

 Mar 28, 2021
 #1
avatar+309 
+1

r = 45

d = 45 * 2 = 90

 

P = 90pi

wink

 Mar 28, 2021
 #2
avatar+106 
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I assume DP is decimal point

 

And if you round to 1 decimal point, it would be about...

 

282.7

(it would be 282.6 if you use 3.14 thoughblush)

~

angel

TealSeal  Mar 28, 2021
edited by TealSeal  Mar 28, 2021
 #3
avatar+309 
+1

True, True, laugh

WillBillDillPickle  Mar 28, 2021
 #4
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Perimeter = 231.4 cm

 Mar 29, 2021

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