3. Inscribed angles
a) m∠RDM = 1/2 (70°) = 35°
b) m∠DRM = 1/2 (180° - 70°) = 1/2 (110°) = 55°
c) m∠DMR = 1/2 (180°) = 90°
d) measure of arc DM = 180° - 70° = 110°
e) measure of arc RD = 180° (half of perimeter of the circle)
4. Inscribed quadrilateral
a) m∠TIA = 1/2 [ (360° - 2(98°) ]
= 1/2 (360° - 196°)
= 1/2 (164°
= 82°
b) m∠FAI = 1/2 [ (360° - 2(75°)]
= 1/2 (360° = 150°)
= 1/2 (210°)
= 105°
