nyiapower9705
09.06.2021 •
Mathematics
3. Find MZADB
4. Find mzABD
5. Find mZAFE
6. Find mZACE
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Ответ:
9514 1404 393
3. 41°
4. 90°
5. 70°
6. 31°
Step-by-step explanation:
The relevant relationships are ...
a semicircle measures 180°an inscribed angle is half the measure of the intercepted arcthe angle where tangents meet is the supplement of the intercepted arcthe angle where secants meet is half the difference of the intercepted arcs__
3. ∠ADB = 1/2 arc AB = 82°/2 = 41°
__
4. ∠ABD = 1/2 arc AED = 180°/2 = 90°
__
5. ∠AFE = 180° -arc AE = 180° -(180° -70°) = 70°
__
6. ∠ACE = 1/2(arc AE -48°) = 1/2(110° -48°) = 62°/2 = 31°
Ответ:
a=8
b=4
c=12
4 x 8 x 4 / 8 x 12 = 192
Hope this helped!!!