# Second Semester Geometry

## Big Ideas

7.1
• Four sided polygon
• Interior angles equal 360°

7.2

-Parallelogram

• Opposite sides are parallel and congruent
• Opposite angles are congruent
• Consecutive angles are supplementary
• Diagonals bisect each other

7.3

-Rhombus

• A parallelogram
• All sides are congruent
• Diagonals are perpendicular
• Each diagonal bisects a pair of opposite angles
-Rectangle
• A parallelogram
• Has 4 congruent angles
• Diagonals are congruent
-Square
• A rhombus and a rectangle

7.4

~Slope

• y1-y2/x1-x2

~Distance

• ((x2-x1)²(y1-y2)²)^½

7.5

-Trapezoid

• A quadrilateral with exactly one pair of // sides
• The // sides are the bases
• Has two pairs of base angles
• Nonparallel sides are the legs
• If legs are congruent then it is an Isosceles trapezoid
Kite
• Diagonals are perpendicular
• Exactly one pair of congruent angles

7.7

-Area

• Parallelogram=bh
• Trapezoid=½h(b1+b2)
• Kite or Rhombus=½(d1d2)
• Triangle=½bh

## Tips to students

• Remember base*height(bh)
• Just divide by two instead of multiplying by half

## tricky subjects

• The area formula isn't bh like the others so you will have to just remember it

## Making the project

• Smore is very easy to use and looks nice when done