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Answer:
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Step-by-step explanation:
Proof of the Pythagoras Theorem using Similarity of Triangles:
Given: In ΔABC, m∠ABC=90°
Construction: BD is a perpendicular on side AC
To Prove: (AC)²=(AB)²+(BC)²
Proof:
In △ABC,
m∠ABC=90° (Given)
seg BD is perpendicular to hypotenuse AC (Construction)
Therefore, △ADB∼△ABC∼△BDC (Similarity of right-angled triangle)
△ABC∼△ADB
(AB/AC)=(AD/AB) (congruent sides of similar triangles)
AB2=AD×AC (1)
△BDC∼△ABC
CD/BC=BC/AC (congruent sides of similar triangles)
BC2=CD×AC (2)
Adding the equations (1) and (2),
AB2+BC2=AD×AC+CD×AC
AB2+BC2=AC(AD+CD)
Since, AD + CD = AC
Therefore, AC2=AB2+BC2
Hence Proved.
Given,,,,