olivasm5626
09.06.2020 •
Mathematics
Find ∠AEC in the figure below.
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Answers on questions: Mathematics
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Ответ:
C. 105°
Step-by-step explanation:
Angles BED and CED are supplementary, so ...
(2y +x) +(-2y +3x) = 180
4x = 180
2x = 90
Substituting this into the expression for angle AEB, we have ...
Angle AEB = (90 -15)° = 75°
Angle AEC is the supplement to that, so is ...
∠AEC = 180° -75° = 105° . . . . . matches choice C
Ответ:
C. 105
Step-by-step explanation:
Adding BED and DEC for being adjacent angles we obtain:
Substituting x in BEA
Adding BEA and AEC for being adjacent angles we obtain:
Ответ: