Sir Mike Ambrose is the author of the question.
Area Blue, in cm² to 1 d. p. is;
Half area regular pentagon with side 12 cm - area triangle with height 6 cm and base 6tan24 cm - area triangle with height 12cos36 and base 12sin36 cm.
= (½*(60*12)/(4tan(180/5))) - ½(6*6tan24) - ½(12cos36*12sin36)
= 123.874372842 - 8.01411633555 - 34.2380345866
= 81.62222192 cm²
≈ 81.6 cm²
We appreciate you contacting us. Our support will get back in touch with you soon!
Have a great day!
Please note that your query will be processed only if we find it relevant. Rest all requests will be ignored. If you need help with the website, please login to your dashboard and connect to support