Question

How can I prove that DEF is an equilateral triangle?

score 1.7k · Answer 1 · 2016-10-29 11:50:15

1.7k

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How can I prove that DEF is an equilateral triangle?

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score 52 · Answer 2 · 2016-10-30 20:05:25

52

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Area of a garden

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score 89 · Answer 3 · 2016-10-31 11:34:58

89

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Prove that: if $\frac{AD}{DE}=\frac{BC}{CF}$ then $AB\|DC\|EF$

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score 95 · Answer 8 · 2016-11-03 12:35:21

95

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score 1.5k · Answer 10 · 2026-04-06 17:20:13

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Any way to solve this right angle triangle problem without trig?

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score 276 · Answer 11 · 2016-11-07 15:34:06

276

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prove that sides of orthic triangle meet the sides of the given triangle in 3 colinear points

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score 743 · Answer 12 · 2026-03-26 04:35:05

743

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In a right-angled triangle of equal opposite and adjacent sides, why is the intersection of the median lines one third of the triangles height?

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score 196 · Answer 13 · 2016-11-07 20:39:34

196

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score 325 · Answer 14 · 2026-03-28 22:24:18

325

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score 160 · Answer 15 · 2016-11-09 14:35:54

160

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List Question

How can I prove that DEF is an equilateral triangle?

Area of a garden

Prove that: if $\frac{AD}{DE}=\frac{BC}{CF}$ then $AB\|DC\|EF$

Similar Triangles Problem (No corresponding sides)

Maximising difference of sides in triangles

finding the top of a triangular pyramid

Analytic Geometry proof of orthogonality in triangle geometry

Proving Triangle

Proving orthocentre of outer triangle is incentre of the triangle formed by the feet of perpendiculars

Any way to solve this right angle triangle problem without trig?

prove that sides of orthic triangle meet the sides of the given triangle in 3 colinear points

In a right-angled triangle of equal opposite and adjacent sides, why is the intersection of the median lines one third of the triangles height?

Proof of series inequality using triangle inequality

Triangles, Quadrilaterals

Parallelogram and triangle

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