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Mathematics 12 Online
OpenStudy (anonymous):

What one additional piece of information would prove ΔTSU ~ ΔHGI? A. T @ H B. U @ I C. GI is twice the length of SU. D. Any of these would be sufficient to prove the triangles similar.

OpenStudy (anonymous):

ganeshie8 (ganeshie8):

A. T \(\cong\) H right ?

ganeshie8 (ganeshie8):

is that congruence symbol which you wrote as @

OpenStudy (anonymous):

there is supposed to be an undefined symbol in front of T and H in A. and an undefined symbol in front of U and I in B.

OpenStudy (anonymous):

the @ symbols are just itself on its own , nothing else added to those .

ganeshie8 (ganeshie8):

very well, you familiar with ASA, AAS, SAS similarity postulates ?

ganeshie8 (ganeshie8):

according to them, any of the given A, B or C is sufficient to prove triangles are similar, refer these postulates, and see how these can be applied here

OpenStudy (anonymous):

i never really understood the similarity postulates . can you help me out ? @ganeshie8

ganeshie8 (ganeshie8):

sure :) we have below postulates 1) AA similarity 2) SSS similarity 3) SAS similarity 4) AAS similarity

ganeshie8 (ganeshie8):

il explain u one, rest of the 3 will make sense to u immediatly ok

ganeshie8 (ganeshie8):

first, let me ask u a question, what these postulates say in general ?

OpenStudy (anonymous):

hm .. that they're similar ? idk ..

ganeshie8 (ganeshie8):

what are similar ?

ganeshie8 (ganeshie8):

each of the postulate tells us "how to figure out if two triangles are similar"

ganeshie8 (ganeshie8):

for example, il draw two triangles, if i ask u to figure out if they are similar or not, what you will u do ?

ganeshie8 (ganeshie8):

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ganeshie8 (ganeshie8):

are the two triangles similar ?

OpenStudy (anonymous):

yes because the triangles are the same shape but different sizes so it would be SSS similarity ?

ganeshie8 (ganeshie8):

Perfect ! you knew it already ! its SSS similarity postulate coz, the ratio of sides is constant. 2/1 = 2/1 = 2/1 = 2

ganeshie8 (ganeshie8):

since all 3 SIDES of first trianlge are proportional to all 3 SIDES of second triangle, the two triangles are simiular by SSS similarity postulate

ganeshie8 (ganeshie8):

SSS you understood already, so lets move on to something else

OpenStudy (anonymous):

i see now !! okay now i need to figure out this problem i posted .

ganeshie8 (ganeshie8):

pick one more in the list above, lets close this first before moving to the problem u posted :)

OpenStudy (anonymous):

oh this is the problem that i am talking about ! the one above !

ganeshie8 (ganeshie8):

or else, il pick one, you explain me what it is ok

ganeshie8 (ganeshie8):

im talking about the similarity postulates, that i listed above

ganeshie8 (ganeshie8):

could u explain what this says : 3) SAS similarity

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