Question

Q13.a) In given figure, triangles ABC and DEF are equilateral .Find the value of ∠A + ∠B + ∠C + ∠D + ∠E + ∠F.

Answer 1

Answer:

360°

Step-by-step explanation:

In ∆ABC,

∠A + ∠B + ∠C = 180°. [ angle sum property]

∠D + ∠E + ∠F = 180°. [ angle sum property]

∠A + ∠B + ∠C + ∠D + ∠E + ∠F = 360°

Hope it helps

Answer 2

Answer:

In a triangle ABC and Triangle DEF

DF=DE =AB=AC in I iso triangle two sides are equal

Triangle ABC coungurent triangle DEF by sss

Now,

Sum of one triangle is 180 than sum of two triangle is 360

∠A + ∠B + ∠C + ∠D + ∠E + ∠F = 360

Hence proved