Question

Answer these questions and I will mark as brainlest answer for sure

Answer 1

Step-by-step explanation:

1. area of equilateral triangle =√3/4a^2

9√3cm^2 = √3/4a^2

a^2 = 9√3/1/√3/4

= 9√3*4/√3*1

= 36√3/√3

= 36

a = √36

a = 6 ans

2. base = 2

height = 4

area = ?

area of isosceles triangle = 1/2 *b*h

= 1/2*2*4

= 8/2

area = 4 ans

3. 1st area =1/2*b*h

let b = b, h = h

so, 1st area = bh/2

2nd area when sides is double

let b = 2b , h = 2h

area =1/2*b*h

= 1/2*2b*2h

= 4bh/2

= 2bh

so, the area will also be double when the sides of the triangle will double.

4. area of equilateral triangle = √3/4a^2

16√3a^2 = √3/4

a^2 = 16√3/1/√3/4

a.t.q

16√3*4/

√3*1

64√3/√3

a^2 = 64

a = √64

a = 8

perimeter = 3a

= 3*8

= 24 cm ans