Which theorem or postuate can be used to prove two triangles are similar? in advance

asa, sas, ssa, saa

There are two theorems/postulates that we can use; SAS and ASA. These two work because they have properties that force the triangles to retain their shape; no resizing of any sort could be done to them.

See the attached images below to see an example of these triangles. The left one is ASA and the right on is SAS.

:)

You can find the area of a rectangle by multiplying the length and height. so multiply 1/2*7/4(which is the simpler version of 1 3/4) and you get 7/8 as your answer.

B. 2 1/2 feet. multiply 2.5 inches by 12 to get thirty inches then divide by 12 to get 2.5 feet