# Welcome to Algebra 1 - Shope-Math ```Geometry 11 December 2012
1) Place binder and text on your desk.
3) WARM UP:
Proof Strip
Page 304: 10 - 12
Triangle Midsegment
The segment connecting the midpoints of two
sides of a triangle is parallel to the 3rd side and
X
is half as long.
1
YZ || RT and RT  YZ
2
Z
T
R
Y
objective
Students will explore and apply polygon
properties.
Students will work collaboratively to do
investigations, write conjectures and apply
properties to solve problems.
due TODAY
5.4: 2, 3, 4, 7
5.5: 1, 2, 3, 5, 6
5.6: 11, 12, 13
TEST CORRECTIONS for NOV. 20 test
TEST- proofs, polygon properties
Wednesday/ Thursday
Semester Review Packet due on your final exam
day
P2- Monday, December 17
P3- Tuesday, December 18
P5 and P6- Wednesday, December 19
Kite Properties
Isosceles Trapezoids
if a quadrilateral is a parallelogram
opposite sides are parallel (DEFINITION)
opposite sides are congruent
opposite angles are congruent
consecutive angles are supplementary
diagonals bisect each other
Using Algebra with Parallelograms
• PQRS is a parallelogram. Find the value of h.
3h + 120 = 180
- 120 -120
P
3h = 60
divide both sides by 3
h = 20
3h
S
Q
120&deg;
R
Definitions…..finish
Rectangle- an equiangular
parallelogram
Rhombus- an equilateral
parallelogram
Square- an equilateral,
equiangular parallelogram
Rectangle Properties
All properties of a parallelogram AND:
• Diagonals are congruent
• All angles are congruent (90⁰)
Rhombus Properties
Rhombuses share all properties of a parallelogram
AND:
(1) Consecutive sides of a rhombus are congruent.
(2) The diagonals of a rhombus bisect pairs
of opposite angles.
(3) The diagonals of a rhombus are perpendicular.
Square Properties
Squares share all properties of a parallelogram
AND rectangles AND rhombus
CAN YOU NAME
all the properties?
Fill in the back of your pink sheet
Kite
Parallelogram Trapezoid
Isosceles Trapezoid
Rhombus
Rectangle
Square
practice
• Do problems on your Semester 1 Review
Sheet