Círculo área y perímetro

me podrían ayudar no soy para nada buena con esto
​

Okay, so, if the m∠1 = 98°, then m∠3 must also equal 98°, because it is on the opposite side of m∠1

Remember, these must all add up to 360, so subtract 98 from 180, as 180 is half of 360.

180° - 98° = 82°

So, m∠2 and m∠4 = 82°

To check our work, simply add everything together.

m∠1 + m∠2 + m∠3 + m∠4 = 

98° + 82° + 98° + 82° = 360°

So, m∠2 = 82°

m∠3 = 98°

m∠4 = 82°

~Hope I helped!~