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In two right triangles ΔABC and ΔDEF,if sinB = sin E then prove that ∠ B = ∠E
NCERT Solutions Class 10 Science from chapter 1 to 16
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Question.In two right triangles ΔABC and ΔDEF,if sinB = sin E then prove that angle B = angleE
We are given two right triangles ΔABC and ΔDEF in which sinB =sinE
Let ∠A and ∠D are right triangles of ΔABC and ΔDEF respectively
GIVEN : sinB = sinE
TO PROVE: ∠B =∠E
Proof: In ΔABC and ΔDEF
sinB = sinE
BC = kEF & AC = kDF……(i)
Applying Pythagoras theorem in both triangles ΔABC and ΔDEF, we have
Putting the value of BC and AC in the equation (i)
Since we have to prove the angles of two triangles, so we are needed to prove both triangles similar to each other.
And proving both triangles similar to each other, here we have to prove all three sides in proportional to each other.
From (i),(ii) and (iii) we have
∴ΔABC ∼ DEF (SSS rule)
Hence ∠B =∠E
OR
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NCERT Solutions for class 10 maths
