Heather must prove this theorem: If a quadrilateral is a parallelogram, then the opposite sides are congruent. 8
theorem. ABCD. and
Below is her paragraph proof of the theorem.
By definition the opposite sides of a parallelogram are parallel. 21 and 2223 because alternate interior angles are congruent. AA BC 2 ACDA by the
BC DA by CPCTC
Which choice correctly fills in the blank line in the paragraph prool?
O SAS
O SSS
O CPCTC
O ASA

its supposed to be CPCTC but my teacher told us to not put it so i dont know

Step-by-step explanation:

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92