Hillary is using the figure shown below to prove Pythagorean Theorem using triangle similarity.

In the given triangle ABC, angle A is 90o and segment AD is perpendicular to segment BC.
Which of these could be a step to prove that BC2= AB2 + AC2?

Question

Hillary is using the figure shown below to prove Pythagorean Theorem using triangle similarity.

In the given triangle ABC, angle A is 90o and segment AD is perpendicular to segment BC.
Which of these could be a step to prove that BC2= AB2 + AC2?

anonymous · Answer

Segment BD : segment BA = segment BA : segment CA,  since triangle ADB is similar to triangle CDA.
		Segment AD : segment CD = segment BD : segment AD,  since triangle ADB is similar to triangle CDA.
		Segment AC : segment DA = segment BC : segment AC,  since triangle ABC is similar to triangle DAC.
		Segment BC : segment AC = segment AC : segment DC,  since triangle ABC is similar to triangle DAC.

anonymous · Answer

@SmoothMath I need your help for real this time><lol

anonymous · Answer

can someone help me my teacher is strict