Question

Seth 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.

Answer 1

Which of these could be a step to prove that BC2= AB2 + AC2?

Triangle ADC is similar to triangle BAC by the SAS similarity theorem.

Triangle ADB is similar to triangle CDA by the SAS similarity theorem.

Triangle ADC is similar to triangle BAC by the AA similarity theorem.

Triangle ADB is similar to triangle CDA by the AA similarity theorem.

Answer 2

yeah!!!!!!!!!!!!!!

Answer 3

I spotted you guys

Answer 4

k

Answer 5

This was a problem I had gotten wrong on the test

Answer 6

Can you give me tips?

Answer 7

Do you happen to know what type of proof this is?

Answer 8

ehh

Answer 9

not really...

Answer 10

I think its pythagorean theorem mabye/

Answer 11

OH! derp...THose 2's are squared...

Answer 12

k

Answer 13

tips?

Answer 14

I believe it's the third one because you would prove them using AA similarity postulate.

Answer 15

ehh

Answer 16

Can you give me steps to reach to this explanation?

Answer 17

Like

Answer 18

k

Answer 19

Do you see how right angles are always congruent?

Answer 20

I see two right angles...

Answer 21

Yeah. 90 = 90, so right angles are always congruent to each other right?

Answer 22

derp. of course!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 23

k

Answer 24

Get it now?

Answer 25

so wait

Answer 26

A=90,A=90=AA?

Answer 27

THe second congruent angle is that other marked angle. See how it's the same angle in both triangles?