dolphinfan321
17.07.2020 •
Mathematics
I Honestly dont understand all of these that have to do with right angles, tangent lines, and secant lines. can i please get some help.
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Ответ:
110°
Step-by-step explanation:
m arc DB=140°
m arc BCD=360-140=220°
∠ A=1/2×220=110° (∵angle at the circumference=1/2 angle at the center.)
Ответ:
D
Step-by-step explanation: