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Mathematics 8 Online
pooja195 (pooja195):

Can someone please help with proofs? http://prntscr.com/96n3xz

jimthompson5910 (jim_thompson5910):

The reason for #4 is `the definition of perpendicular angles` when you say 2 angles are perpendicular, it means that a right angle or a 90 degree angle forms all right angles are congruent to one another since they all equal 90 degrees

pooja195 (pooja195):

Oh ok that makes sense are the rest correct?

jimthompson5910 (jim_thompson5910):

Instead of ASA, use AAS notice how the side isn't sandwiched between the two angles

pooja195 (pooja195):

Does the order really matter? :/

jimthompson5910 (jim_thompson5910):

yes they are slightly different you could go from AAS to ASA (or vice versa) easily since knowing 2 angles of a triangle leads you to find the third angle. However, they don't have that part of the proof shown. IF they had `angle ABC = angle DEC`, then you could use ASA

pooja195 (pooja195):

ah ok makes sense thank you soooo much! :D

jimthompson5910 (jim_thompson5910):

np

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