anonymous
  • anonymous
I need help... If meas. of angle DBC=40, then meas. of arc CD and arc BC=? angle meas. of ECB=? DCF=? BDC=? Refer to picture below.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
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Directrix
  • Directrix
If meas. of angle DBC=40, then meas. of arc CD = 80 because an inscribed angle of a circle has measure half its arc. and arc BC= 100 because it and arc CD form a semi-circle with measure 180 angle meas. of ECB= 50 because it is an angle formed by a tangent and a secant on the circle and has measure half its intercepted arc. DCF= 130 because it and forms a linear pair with anglee ECB BDC= 90 because an angle inscribed in a semi-circle is a right angle.
anonymous
  • anonymous
thank you!!

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