third porpotional to 9 and 12 is??
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Answered by
0
Answer:
olution
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Given, AB= 5 , AC = 6 and BC = 7. Perimeter(△PQR) = 360
Now, Perimeter(△ABC) = 5 + 6 + 7 = 18 units
hence,
Perimeter(△PQR)
Perimeter(△ABC)
=
PQ
AB
=
QR
BC
=
PR
AC
360
18
=
PQ
5
=
QR
7
=
PR
6
20
1
=
PQ
5
=
QR
7
=
PR
6
PQ=100 units, QR=140 units, PR=120 units
Answered by
1
If a, b, and c are in proportion
⇒ a/b = b/c ⇒ b2 = ac
Calculation:
Let the third proportional to 9 and 12 be x
According to the question
9 : 12 :: 12 : x
⇒ 9/12 = 12/x
⇒ x = (12 × 12)/9
⇒ x = 16
∴ The third proportional to 9 and 12 is 16.
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⇒ a/b = b/c ⇒ b2 = ac
Calculation:
Let the third proportional to 9 and 12 be x
According to the question
9 : 12 :: 12 : x
⇒ 9/12 = 12/x
⇒ x = (12 × 12)/9
⇒ x = 16
∴ The third proportional to 9 and 12 is 16.
Mark me as a brainliest
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