Unit 8 Parallelograms 2025

Match the rules of quadrilaterals with the appropriate quadrilateral.

• Equal and Parallel

• Diagonals of a Square

• Bisect Each Other and bisect angles

• Square, rhombi, rectangle, parallelogram

• Congruent and Perpendicular

• Diagonals of a Rhombus

• Diagonals bisect each other

• Opposite Sides of a Parallelogram

• Right angles

• True of all angles of square and rectangle

What else is true of Parallelograms?

• The parts are equal

• Diagonals of a rectangle

• Are = to each other

• When diagonals bisect each other

• Do NOT bisect angles

• Diagonals of a rhombus AND square

• Bisect the angles AND are perpendicular

• Consecutive angles of a parallelogram

• sum up to 180

• Opposite angles and sides of a parallelogram

Find the stated lengths in the parallelogram

• BC is 13.9

• BC is 16.4

• CD is 13.9

• CD is 16.4

Find out the x and y value

• n = 2, AB = 11

• n = 0, AB = 5
• n = 3, AB = 14
• n = 1, AB = 8

CDEF is a rhombus, find the value of x and then Angle FDE.

Find x and then Angle DFG

What is the measure of <D?

Mathematical Equivalence

ON

In parallelograms, there are ​ (a)   pair(s) of parallel sides. The diagonals​ (b)   , opposite sides are​​ (c)   and congruent, consecutive angles are ​ (d)   , and opposite angles are ​ (e)   .

• congruent
• complementary
• perpendicular
• bisect each other
• are perpendicular
• parallel
• 2
• 4
• supplementary