Question

if the area of the equilateral triangle is​

Answer 1

Answer: 9√3 cm

Step-by-step explanation:

Area = √3 * a²/4, where a = side length

81√3 = √3 * a²/4

a² = 81√3*4/√3 = 81*4

a = √81*4 = 9*2 = 18 cm

Height = √3*a/2 = √3*18/2 = 9√3 cm

Answer 2

✌✌HELLO MATE✌✌

⬇⬇ANSWER⬇⬇

AREA OF EQUILATERAL TRIANGLE =( ROOT 3/4) a^2

81 ROOT 3 =( ROOT3/4)a^2

(81 ROOT 3)/a^2 = ROOT 3/ 4

1/ a^2 = ROOT 3 /4×81 ROOT 3

1/a^2 = 1/324

a^2 = 324

a = ROOT 324

a = 18

IN A TRIANGLE

BM = MC

BM =1/2 (BC)

= (1/2 ) × 18 = 9cm

BY Pythagoras THEOREM

AB^2 = BM^2 + AM^2

(18)^2 = (9)^2 + AM^2

324- 81= AM^2

243 = AM^2

AM= ROOT 243

15.5 cm ^2 ANSWER✔✔✔

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