Parallelograms
Instruction Active
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 all interior angles
Statements
Reasons
Demo
) Intro

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed