In a - ABC- DE is parallel to BC and D is the mid-point of side AB- Find the perimeter of - ABC when AE-4-5 cm- DE-5 cm and DB-3-5 cm-

R.E.F image #160;Since DE||BC and D is mid point of AB, by #160; mid point theorem E is mid point AC and BC #160; =2 DE =10cm ∴ peri ...

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In a Δ ABC,...

Question

In a $Δ A B C, D E$ is parallel to $B C$ and $D$ is the mid-point of side $A B$ . Find the perimeter of $Δ A B C$ when $A E = 4.5 c m, D E = 5 c m$ and $D B = 3.5 c m$ .

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Solution

R.E.F image
Since $D E | | B C$ and D is mid point of AB, by mid point theorem E is mid point AC and BC $= 2 D E$
$= 10 c m$
$∴$ perimeter $= 3.5 + 3.5 + 4.5 + 4.5 + 10$
$P = 26 c m$

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In a ΔABC, DE is parallel to BC and D is the mid-point of side AB. Find the perimeter of ΔABC when AE=4.5 cm, DE=5 cm and DB=3.5 cm.

R.E.F image Since DE||BC and D is mid point of AB, by mid point theorem E is mid point AC and BC =2DE=10cm∴ perimeter =3.5+3.5+4.5+4.5+10P=26cm

In a $Δ A B C, D E$ is parallel to $B C$ and $D$ is the mid-point of side $A B$ . Find the perimeter of $Δ A B C$ when $A E = 4.5 c m, D E = 5 c m$ and $D B = 3.5 c m$ .

R.E.F image
Since $D E | | B C$ and D is mid point of AB, by mid point theorem E is mid point AC and BC $= 2 D E$
$= 10 c m$
$∴$ perimeter $= 3.5 + 3.5 + 4.5 + 4.5 + 10$
$P = 26 c m$