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The triangle ABC is isosceles (AB = AC)
DE parallel to BC
You need to prove: The ADE triangle is isosceles

The triangle ABC is isosceles AB AC DE parallel to BC You need to prove The ADE triangle is isosceles class=

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luisecubero77

Answer:

ΔADE is isosceles

Step-by-step explanation:

Δ ABC is isosceles

AB ≅ AC

∠B ≅ ∠C

If DE parallel to BC

AD ≅ AE

∠D ≅ ∠E

ΔADE is isosceles

The isosceles triangle is a polygon with three sides, two being equal and the other unequal.

The angles D and E will also be equal  and the A other different.