if the perimeter of a semicircular protractor is 36 cm find its diameter use Pi is equal to 22/7
Answers
Answered by
3
-Hey there!
-Here is the answer for your question :
Circumference of semicircular protractor = 36 cm
πr + 2r = 36 cm
⇒ 22r/7 + 2r = 36
⇒ 36r/7 = 36
⇒ 36r = 36*7
⇒ r = 252/36 = 7 cm
Therefore diameter = 2r
=2 × 7 = 14 cm
—————————————•
•Hope it helped you!
•Mark as brainliest, please!
mn121:
wrong answer
formula of semicircle is r((22/7)+2)
Look circumference of circle = 2πr
semicircle is half of circle
therefore circumference of semicircle = 1/2×2πr
= πr
Plus the diameter
It’s same Sorry
Answered by
2
perimeter of a semicircular protractor = 36 cm
∵ perimeter = πr + 2r
∴ πr + 2r = 36 cm
⇒ 22r/7 + 2r = 36
⇒ 36r/7 = 36
⇒ 36r = 36*7
⇒ r = 252/36 = 7 cm
∴ diameter = 2r = 2*7 = 14 cm
hope it helps you...
please mark it as brainliest...
^_^
Similar questions