the perimeter of a sector of a circle whose central angle is 90 degree and radius is 7cm is:
(A)35cm (B)25cm (C)77cm (D)7cm
Answers
Answered by
3
pєrímєtєr σf ѕєctσr = °/180×πr + 2r whєrє ° íѕ thєєtα.
ѕuвѕtítutíng thє vαluє wє gєt,
90/180 × 22/7 × 7 + 2 × 7
1/2 ×22/7 × 7+ 14
11+14
=25 cm
hєncє cσrrєct σptíσn íѕ в
hσpє ít hєlpѕ.
plz mαrk ít αѕ вrαínlíєѕt αnѕwєr
ѕuвѕtítutíng thє vαluє wє gєt,
90/180 × 22/7 × 7 + 2 × 7
1/2 ×22/7 × 7+ 14
11+14
=25 cm
hєncє cσrrєct σptíσn íѕ в
hσpє ít hєlpѕ.
plz mαrk ít αѕ вrαínlíєѕt αnѕwєr
Answered by
0
Answer:
(C) 77cm
Step-by-step explanation:
Formula: =2r+rФ
=2(7) + (7) (90)
=14+63
P=77
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