Practicing Success
AB and CD are two chords in a circle with centre O and AD is the diameter. When produced, AB and CD meet at the point P. If ∠DAP = 27°, ∠APD = 35°, then what is the measure (in degrees) of ∠DBC? |
28 26 30 32 |
28 |
\(\angle\)DAP = \({27}^\circ\) \(\angle\)APD = \({35}^\circ\) In \(\Delta \)ADP ⇒ \(\angle\)ADC = \({27}^\circ\) + \({35}^\circ\) = \({62}^\circ\) ⇒ \(\angle\)ABC = \(\angle\)ADC = \({62}^\circ\) (angle formed by same arc) ⇒ \(\angle\)ABD = \({90}^\circ\) (angle formed by diameter in semi circle) ⇒ \(\angle\)DBC = \(\angle\)ABD - \(\angle\)ABC ⇒ \({90}^\circ\) - \({62}^\circ\) = \({28}^\circ\) Therefore, the answer is \({28}^\circ\) |