Circumferences 83111

Péta composed several planar shapes from mutually congruent triangles. The circumferences of the first three are 8 cm, 11.4 cm, and 14.7 cm, respectively. Determine the perimeter of the fourth shape.

Correct answer:

o4 =  10 cm

Step-by-step explanation:

Δ o=a+b+c o1=8 cm o2=11.4 cm o3=14.7 cm  o1 = 2a+2b o2 = 2a+2c o3 = 3 (a+b+c)  (a+b+c) = 2 (a+b+c) = 2a+2b+2c  o1=2a+2b o2=2a+2c o3=2a+2b+2c 8=2a+2b 11.4=2a+2c 14.7=2a+2b+2c  8=2 a+2 b 11.4=2 a+2 c 14.7=2 a+2 b+2 c  2a+2b=8 2a+2c=11.4 2a+2b+2c=14.7  Row2Row1Row2 2a+2b=8 2b+2c=3.4 2a+2b+2c=14.7  Row3Row1Row3 2a+2b=8 2b+2c=3.4 2c=6.7  c=26.7=3.35 b=23.42c=23.42 3.35=1.65 a=282b=282 1.65=2.35  a=2047=2.35 b=2033=1.65 c=2067=3.35  o4=2 b+2 c=2 1.65+2 3.35=10 cm



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







Tips for related online calculators
Do you have a linear equation or system of equations and looking for its solution? Or do you have a quadratic equation?

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

Related math problems and questions: