Question

Complete the two-colomn proof.
Given: ∆JUG is an equilateral and Un is one of its medians
∆
Prove: ∆JUN ≈ ∆GUN
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Answer 1

∆JUG is equilateral triangle

therefore all sides are equal

UN is the median which cut JG into two equal halves

JU = GU ( equilateral triangle)

UN = UN ( common arm)

JN = GN ( JG divided by UN median)

∴ ∆JUN ≅ ∆GUN [ from SSS criteria]