Which of the following is not a method used to prove triangles congruent? a) aas theorem b) ssa postulate c) sas postulate d) asa postulate

B) SSA Postulate

Step-by-step explanation:

Two triangles are congruent if they are of the same shape and size.

Two triangles can be proved congruent by AAS ,SAS ,ASA ,SSS ,HL postulates.

Two triangles are congruent if two angles and one side of both the triangles are congruent that is AAS and ASA postulates.(option A and D)

The triangles can be congruent by SAS that is if two sides and included angle of two triangles are congruent then the triangles are congruent .(Optionc)

Option B that is SSA is not a congruence postulate.

853.3

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -