Perimeter (L4BC2
4. FAABC-APQR and
Perimeter (APQR)
BE AB = 4cm, find PQ
The length of the tangent in a cirle
famoin
. O
Answers
Answered by
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Answer:
BP=BR and CR=CQ
Length of tangents drawn from an external point to a circle are equal.
Perimeter of △ABC=AB+BR+RC+CA=AB+BP+QC+CA
=AP+QA(AP=QA)
=2AP
In △APO, using pythagaras theorem
AO
2
=AP
2
+PO
2
⇒13
2
=AP
2
+5
2
⇒AP=
169−25
AP=
144
=12
∴ Perimeter of △ABC=2AP=2×12=24cm
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