1.
A
traffic
signal
board
,
indicating
'
SCHOOL
AHEAD
'
,
is
an
equilateral
triangle
side
'
a
'
.
Find
the
area
of
the
signal
board
,
using
Heron's
formula
.
If
its
perimetet
EXERCISE 12.1
180 cm, what will be the area of the signal board?
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Answer:
share the picture of ur tb
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