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3 years ago

4. ADEF is an equilateral triangle. E 24 20 D F

Mathematics

1 answer:

irinina [24]3 years ago

7 0

By Pythagorean theorem

x²+GF²=EF² ( where G is the point of intersection of perpendicular lines)

now, GF=1/2 EF= 12

x²+12²=24²

x²=24²-12²

x²=432

x=√432

x=12√3

x≈20.78

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