Question

If mCA = 50° and mER = 40⁰, what is the m∆CSA ?​

Answer 1

Answer:

• 45°

Step-by-step explanation:

Given:

• mCA = 50°
• mER = 40⁰

Angle formed by intersecting chords is the half the sum of arc measures formed by same chords:

• m∠CSA = m∠ESR = 1/2(mCA + mER) = 1/2(50° + 40°) = 45°