Question

plz answer me in this question ​

Answer 1

To prove : A + B +C + D + E+ F= 4right angles

Proof : In ∆ABC,

A+B+C = 180° (angle sum property of ∆)

In ∆DEF,

D+E+F = 180° (angle sum property of ∆)

Adding both the equations,

A+B+C+D+E+F = 360°

=> A+B+C+D+E+F = 4right angles

Hence, proved.

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