the length of a rectangle is half as much again as its breadth. If the perimeter of the rectangle is 120m​

20 and 40

Step-by-step explanation:

120/2=60

3x=60

x=20

20x2=40 since it is two times

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

no not all of them.

step-by-step explanation:

some of them have a square base.