Question

please explain step wise ​

Answer 1

Answer:

the Answer is 100 ° by angle sum property

Answer 2

$\huge \pink{answer}$

$\bold \red {→ OAP \: And \: ∠OBP=90°}$

$\bold \red{∠OAP+∠AOB+∠OBP+∠APB=360°}$

$\bold \red{90°+∠AOB+90°+80°=360°}$

$\bold \red{∠AOB+260°=360° }$

$\bold \red{∠AOB=360°-260°=100°}$