Download Math CC7/8 * Sept. 6

Math CC7/8 – Sept. 16
Things Needed Today (TNT):
Math Notebook/Pencil
Shapes & Designs 3.2
Labsheet 3.2
Learning Log:
1.Topic: Drawing Triangles
2.Homework: p. 76 #6-9, #40
What’s Happening?
Warm Up
Lesson- S&D 3.2!
1 minute
End
Warm-Up
WRITE down each problem & SOLVE
Show ALL your work & THINKING
Answers to Warm Up
Check your work in a different colored pen or color pencil
Launch video 3.2 (video A0240932)
These SSA won’t create a unique
triangle, but some such
combinations will.
AAA won’t make a congruent
triangle, the side lengths may be
different.(similar triangle)
AAS will make a unique triangle
because we know the third angle must
be 180-106 degrees. (ASA situation)
Use labsheet 3.2B
• Draw an equilateral triangle
with sides 4cm.
• Draw an angle of 60 degrees
and mark 2 sides of 4 cm on
the legs of that angle. Then
connect the end points.
• Draw a right triangle with
legs 4 cm and 5 cm.
• Draw an angle of 90 degrees
and mark sides of 1.5 inches
and 2 in on the legs of that
angle. Then connect the end
points.
Use labsheet 3.2B
• You need to give either 2 sides
and the included angle, or 2
angles and the side.
• Angles = 30, 125, 25 degrees
• Sides = 2, 2.5, and 4 inches
• Draw an isosceles triangle
with vertex angle 40
degrees and equal sides 2.5
in long.
• Draw an isosceles triangle
with base 4.2 cm long and
base angles 70 degrees.
You need at least 3 sides and/or angle measurements, but not ANY
three.
Given SSS - there will only be one triangle.
Given 2 angles and one side length (either the included side (ASA) or the
nonincluded side (AAS)), there will be only ONE triangle.
All copies of the right triangle using the same 3 sides
lengths will make the same triangle. The order in which
you connect the sides does NOT matter. So, the copy will
also be a right triangle.
Homework: p. 76 #6 – 9, #40
Homework
If time start your HW
p. 76 #6-9, # 40