Geometryhard · Past Paper
In a triangle ABC, internal bisector of angle A meets BC at D. If AD is also perpendicular to BC, the triangle is:
AScalene
BIsosceles
CObtuse
DRight-angled only
✓ Correct Answer: B — Isosceles
If the angle bisector and altitude from the same vertex coincide, the triangle is isosceles (AB=AC).
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