In , , and . Which of the following is always…

MATHEMATICS · Single correct · CBSE · Mathematics · Triangles · Triangles

Problem

In △DEF\triangle DEF, ∠D=4y+10∘\angle D = 4y + 10^{\circ}, ∠E=2y+40∘\angle E = 2y + 40^{\circ} and ∠F=4y+10∘\angle F = 4y + 10^{\circ}. Which of the following is always true? (a) DE=DFDE = DF (b) DE=EFDE = EF (c) DF=EFDF = EF (d) DE=DF=EFDE = DF = EF

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