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Proving the Parallelogram Side Theorem
Given: ABCD is a parallelogram.
Prove: AB CD and BC DA
Angles Segments Triangles Statements
Reasons
given
def of parallelogram
unique line postulate
def. of alt interior angles
Statements
Reasons
Demo
Intro

by definition, an arc subtended by a central angle of some given measure has the same measure. so .

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

answer: idk

step-by-step explanation: