Question

? In an A
equilateral 4, peopendicular side
from the corner to opposite is 12cm
find its perimetes and area?​

Answer 1

Answer:

Here AD=12cm

∴ In ΔABD

∠B=60o

∠AOD=90o

∠BAD=30o

∴sin60o=ABAD

∴23=AB12

∴AB=324

∴AB=83cm

∴ Perimeter of triangle=83×3

=243cm

∴ Area of triangle =43×(side)2cm2

∴ Area of triangle=43×(83)2

∴ Area of triangle=43

HOPE IT HELPS YOU