Answer: The measure of arc DAB is 218°.
Step-by-step explanation:
Since we have given that
∠APD = 128°
and
∠BPD = 90°
So, we need to calculate the measure of arc DAB.
Arc DAB contains two angles :
1) ∠APD
2)∠BPD
So, Sum of both the above angles = Measure of arc DAB
Measure of arc DAB is given by
\(128^\circ+90^\circ\\\\=218^\circ\)
Hence, the measure of arc DAB is 218°.
