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26-11-2019
Mathematics

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If D=25 use information in the figure below to determine angle F

If D25 use information in the figure below to determine angle F class=

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26-11-2019

Answer:

130°

Step-by-step explanation:

DEF is an isosceles triangle with base DE and DF = EF.

By definition, base angles of an isosceles triangle are equal.

Hence ∠FDE = ∠DEF = 25°

Angle F = 180° - ∠FDE - ∠DEF

= 180° - 25° - 25°

= 130°

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