in triangle abc d is the midpoint of a b and e is the midpoint of ac find de if BC is equal to 6 cm and ab is 3.5 cm
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AB=2AD (AD is the mid point of AB)
AB=2×3.5cm
AB=7cm
AC=2AE
AC=2×4cm
AC=8cm
BC=2DE (Midpoint Theorem)
BC=2×2.5cm
BC=5cm
Perimeter =AB+BC+CA
=7+5+8
=20cm
Step-by-step explanation:
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