Q. 4. In circle X shown, m \overparen{A S}=11^{\circ} and m \overparen{M S}=104^{\circ} . Determine m∠DCM.
Identify Relationship: Identify the relationship between the arcs and the angles in a circle. In a circle, the measure of an angle formed by two chords that intersect inside the circle is equal to half the sum of the measures of the arcs intercepted by the angle and its vertical angle.
Calculate Angle ASM: Calculate the measure of angle ASM using the given arc measures.The measure of angle ASM is half the sum of the measures of arcs AS and MS.m∠ASM=2mAS◯+mMS◯m∠ASM=211∘+104∘m∠ASM=2115∘m∠ASM=57.5∘
Determine Angle DCM: Determine the measure of angle DCM.Since angle DCM is vertical to angle ASM, they are congruent and have the same measure.m∠DCM=m∠ASMm∠DCM=57.5∘
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