Silver medal

A circular silver medal with a diameter of 10 cm is an inscribed gold cross consisting of five equal squares. What is the area of the silver part?

b) What is the area of the golden cross?

Correct answer:

S =  28.54 cm2
S5 =  50 cm2

Step-by-step explanation:

D=10 cm r=D/2=10/2=5 cm  D2 = a2 + (3a)2 D2 = a2 + 9a2 D2 = 10 a2  D = 10 a a=D/10=10/10=10 cm3.1623 cm n=5  S5=n a2=5 3.16232=50 cm2 S2=π r2=3.1416 5278.5398 cm2  S=S2S5=78.53985028.5398 cm2   Verifying Solution:   S3=5+1/2+1/25 S2=5+1/2+1/25 78.539865.4498 cm2 S5  S



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Need help calculating sum, simplifying, or multiplying fractions? Try our fraction calculator.
Tip: Our volume units converter will help you convert volume units.
The Pythagorean theorem is the base for the right triangle calculator.

You need to know the following knowledge to solve this word math problem:


 
We encourage you to watch this tutorial video on this math problem: video1   video2

Related math problems and questions: