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Answer: In a regular decagon, there are 10 lines of symmetry.
Step-by-step explanation:
Line of symmetry divides a figure into two equal halves so that if you flip the half image over the line of symmetry , the figure will look unchanged.
A regular decagon has 10 vertices and 10 edges.
To draw line of symmetry :
1.Draw lines to meet the exactly opposite point [shown by red color in the picture attached with the answer].
∴ 10 vertices will form 5 lines of symmetry.
2.Draw lines from the mid points of all the edges to the midpoint of the exactly opposite edge [shown by blue color in the picture attached with the answer].
∴ 10 edges will form 5 lines of symmetry.
⇒Total lines of symmetry in a decagon =5+5= 10
Number of girls in the school = 675 * 0.56 = 378
2/9 of these are over 16 , so this is:-
378 * 2/9 = 84 Answer
8x + 16 = 8( x + 2)
6x + 12= 6( x + 2)
8(x + 2). times 4x
2o 6( x + 2)
cancel (x + 2)
8 times 4x = 32x simplify = 4x
20 6 120 15