Statements Reasons
BC
1. Given
2. Angle Addition Postulate
3. Linear Pair Postulate
1. AD 1
2. mZ3+mZ5 =mZDAB
3. m24+mZDAB= 180°
4. m24+mZ3+ m25 = 180°
5. Z1 24, 22 25
6. mZ1= m24, m_2= m25
7. mZ1+mZ2 +mZ3 = 180°
4. Substitution Property of Equality
5.
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6. Definition of Congruent Angles
7.
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you can go on something called tiger algerbra

Step-by-step explanation:

< 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⭐

umumumumum

im not sure