answer: 75°
step-by-step explanation:
∠esk is the supplement of ∠edk, so is 100°. ∠esd = 1/2·arc ed, so is 25°.
since ∠esk = ∠esd + ∠dsk
you have 100° = 25° + ∠dsk . .
fill in known values 75° = ∠dsk . . . . .
subtract 25°
step-by-step explanation:
![Basic circle problem given: measure of arc ed = 50°, m∠edk = 80° find: ∠dsk](/tpl/images/04/02/RFohlE5NYfbBtumF.jpg)