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Lubov Fominskaja [6]
3 years ago
15

Can someone help me on number 20

Mathematics
2 answers:
expeople1 [14]3 years ago
6 0
The answer is eleven
GalinKa [24]3 years ago
3 0

Answer:

answer is 20

we know that,

perimeter of a triangle =all sides of triangle.(ie.A+B+C)

LIKEWISE..

perimeter of 1st triangle

=5+x-5+x-4

=2x-4

again,

perimeter of 2nd triangle

=16+10+x-10

=16+x

now according to question

perimeter of 1st triangle =perimeter of 2nd triangle

2x-4=16+x

2x-x=16+4

therefore ...x=20

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