Question

find the area of quadrilateral triangle having side 20 m.​

Answer 1

if abc is an equilateral triangle, then ab=bc=Cd=20cm

perimeter=60cm

semi-perimeter=30cm

(s-a)= 30-20=10

(s-b)=30-20=10

(s-c)=30-20=10

area=30×√10×√10×√10

area=100√3 cm square

Answer 2

area = 100√3 m square

this is the answer