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karito29
@karito29
July 2022
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Найдите площадь трапеции
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LyubaAlexandorovna
AC=2*CE=10 (СЕ - катет против <30)
AE=√100-25=5*√3
BC=AE-ED
AD=AE+ED
S(ABCD)=(AD+BC)*CE/2=(AE-ED+AE+ED)*CE/2=2*AE*CE/2=AE*CE=
=5*5*√3=25*√3
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Answers & Comments
AE=√100-25=5*√3
BC=AE-ED
AD=AE+ED
S(ABCD)=(AD+BC)*CE/2=(AE-ED+AE+ED)*CE/2=2*AE*CE/2=AE*CE=
=5*5*√3=25*√3