Question

"Find the perimeter and area of an equilateral triangle whose height is 12 cm . Write your answers , correct to two decimal places. "..plz send answer as fast as possible..urgent..notebook checking tomorrow..

Answer 1

hi dear
the perimeter of equilateral triangle is
= 3 × side
= 3 × 12
= 36 cm.
now,
area of equilateral triangle is
= root3 /4 × side ^2
= root3 / 4 × 144
= root3 × 36
= 36root 3 sq. cm

I hope you get the ans.
THANK YOU.

Answer 2

Hi ,

Height of the equilateral triangle

( h ) = 12 cm

Side ( a ) = ( 2h ) / √3

= ( 2 × 12 ) / √3

= ( 8 × 3 ) / √3

= 8√3 cm

Perimeter = 3a

= 3 × 8√3

= 24√3 cm

Area = ( √3 / 4 ) a²

= ( √3 / 4 ) ( 8√3 ) ²

= 48√3 square cm

I hope this helps you.

:)