Warmup: Angles in Quadrilaterals
For 1-3, find all the missing angle measures.
1) 2)
3)
105°
75°
75°
52°
128° 128°
95°
120°
Homework Answers
pg. 1249 (1-4, 7-10, 15, 17)
28° 57°
Quiz Tomorrow
Know everything on the review sheet How to draw the special segments of
triangles Triangle Midsegment Theorem All Properties of Quadrilaterals
Know how to do proofs with diagonals and match statements and reasons in a proof
Write a two-column proof.
Given: ABCD is a parallelogram.
Prove: ∆AEB ∆CED
FACT: The diagonals of a rectangle are congruent.
A B
C D
𝑨𝑪 ≅ 𝑩𝑫
How could we
prove this???
FACT: The diagonals of a rhombus are perpendicular.
A
B
C
D
𝑨𝑪 ⊥ 𝑩𝑫
How could we
prove this???
Most specific Name?
Rectangle
Most specific Name?
Rhombus
Most specific Name?
Trapezoid
Most specific Name?
Kite
Most specific Name?
Parallelogram
Most specific Name?
Quadrilateral
Most specific Name?
Isosceles Trapezoid
Most specific Name?
Kite
Most specific name?
Parallelogram
Which is not necessarily a rhombus?
Which MUST be a square?