Question

find the number of diagonal of different polygon. n=4 to n=10. (Quadrilateral to Decagon)..Formula, No. of diagonals =n(n-3) Please give me the answer ​

Answer 1

Answer:

n(n-3)/2

Step-by-step explanation:

n(n-3)/2

(1) 4(4-3)/2 = 4/2 = 2

(2) 10(10-3)/2 = 10*7/2 = 70/2 = 35

Answer 2

here is your answer beautiful.

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to find the number of diagonals we just have to put the value of n in the formula.

(1) n= 4.so,

n=4(4-3)/2

n=(16-12)/2

n= 4/2

n= 2

(2)n = 10

n = 10(10-3)/2

n = (100 - 30)/2

n = 75/2

n = 35