rdoughtie593 rdoughtie593

11-03-2021
Mathematics

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

4 ADEF is an equilateral triangle E 24 20 D F class=

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Аноним Аноним

11-03-2021

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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