Download Week 36 Slides

May 8, 2017
Mr. Collin
7th Grade Math
• Test Retakes
– Final day to retake tests will be next
Friday
• Final test will be next Wednesday
– No retakes available
– If you will miss school, let me know
ASAP
7th Grade Math
7th Grade Math
• Let’s go over what we have learned
so far:
– Acute Angle
– Right Angle
– Obtuse Angle
– Supplementary Angles
– Complementary Angles
7th Grade Math
• Let’s go over what we have learned
so far:
– Vertical Angles
– Congruent
7th Grade Math
Find all of the missing angles:
40°
7th Grade Math
Find all of the missing angles:
70°
50°
7th Grade Math
Sometimes, we will need to use algebra
to solve:
120°
12x°
(5z+20)°
(50+y)°
7th Grade Math
Tomorrow:
1) 3&6
2) 1&2
3) 4&5
4) 2&6
5) 1&4
Due Friday:
Bottom left corner
of triangle in first
problem should say
60°
7th Grade Math
May 9, 2017
Mr. Collin
7th Grade Math
Find the measurement of each missing
angle:
80°
50°
7th Grade Math
• If you received a stamp, you will trade
your homework with the person
sitting next to you (or someone else
near you)
• When you get another person’s
homework, write your name in the
“Corrected By” line at the bottom
7th Grade Math
1)
2)
3)
4)
5)
6)
55
35
55
90
13
5
7) 30
8) x = 7
9) k = 35
10) m = 6
11) t = 10
12) w = 7/2
7th Grade Math
• If seven or more answers are correct
and there is a stamp on the page,
write “4” in the score box
• If six or fewer answers are correct,
then write “2” in the score box
7th Grade Math
• Clarification:
Problem #6 is a right angle
7th Grade Math
• All triangles must have two acute
angles
• We classify triangles by the largest
angle
7th Grade Math
Acute Triangle
Right Triangle
Obtuse Triangle
7th Grade Math
• There is another way we can classify
triangles
• We will classify them based on how
many sides are congruent
• Therefore, triangles will have more
than one classification
7th Grade Math
• If no sides are congruent, it is a
scalene triangle
7th Grade Math
• If at least two sides are congruent, it is
an isosceles triangle
7th Grade Math
• If at all three sides are congruent, it is
an equilateral triangle
7th Grade Math
What words can we use to classify this
triangle?
7th Grade Math
Classify each of the following:
7th Grade Math
May 10/11, 2017
Mr. Collin
7th Grade Math
Find the measurement of each missing
angle:
30°
70°
7th Grade Math
• If you received a stamp, you will trade
your homework with the person
sitting next to you (or someone else
near you)
• When you get another person’s
homework, write your name in the
“Corrected By” line at the bottom
7th Grade Math
1)
2)
3)
4)
5)
6)
7)
Vertical
Adjacent
Adjacent
Neither
Vertical
32°
39°
8) Scalene, Acute
9) Obtuse, Isosceles
10) Acute, Equilateral,
Isosceles
11) Right, Isosceles
12) Obtuse, Scalene
13) Right, Scalene
7th Grade Math
• If seven or more answers are correct
and there is a stamp on the page,
write “4” in the score box
• If six or fewer answers are correct,
then write “2” in the score box
7th Grade Math
• For this project today, you will need a
piece of construction paper, a ruler,
and a glue stick
7th Grade Math
Using your ruler,
make a triangle on
the construction
paper. It can be any
dimensions, but
leave some room in
the middle of it.
7th Grade Math
From each edge,
draw a line to the
middle of the
triangle. They
should meet in the
middle.
7th Grade Math
Label each corner of
the triangle so that
you will recognize
them later.
7th Grade Math
Cut out the triangle
from the
construction paper.
7th Grade Math
Cut along the lines
you drew in the
middle of the
triangle.
7th Grade Math
Finally, you will take the three pieces of
the triangle and arrange them so that
all of the marked corners are adjacent
to each other. Glue them to a piece of
paper with all of the edges aligned.
7th Grade Math
• What do you notice about all of the
triangles now?
• Even though all of you started with a
completely different triangle, all of
your triangles ended up making a
straight line when the corners were
put together
7th Grade Math
• All of the interior angles of a triangle
will add up to 180 degrees, no matter
what kind of triangle it is.
• We can use this to find missing angles
of any triangle.
7th Grade Math
How would we find the missing angle
of the triangle below?
55°
80°
?
7th Grade Math
Find the missing angles:
1)
2)
75°
30°
100°
75°
3)
4)
20°
60°
60°
7th Grade Math
If the triangle is a right triangle, the two
acute angles must add up to 90
degrees
20°
7th Grade Math
Let’s try to solve for the variable:
2x°
x°
7th Grade Math
Solve for the variable:
(x+10)°
x°
7th Grade Math
May 12, 2017
Mr. Collin
7th Grade Math
Draw a sketch of each of the following:
1) Right Isosceles triangle
2) Obtuse Scalene triangle
3) Equilateral triangle
4) Acute Scalene Triangle
5) Obtuse Isosceles triangle
7th Grade Math
• If you received a stamp, you will trade
your homework with the person
sitting next to you (or someone else
near you)
• When you get another person’s
homework, write your name in the
“Corrected By” line at the bottom
7th Grade Math
1)
2)
3)
4)
5)
6)
7)
8)
82°
88°
126°
70°
45°
51°
45°
62°
9) Isosceles, Acute
10) Right, Scalene
11) Obtuse, Scalene
12) Acute, Isosceles,
Equilateral
13) Obtuse, Isosceles
14) Acute, Scalene
7th Grade Math
• If eight or more answers are correct
and there is a stamp on the page,
write “4” in the score box
• If seven or fewer answers are correct,
then write “2” in the score box
7th Grade Math
• I will put you in teams of three or four
• Each team will need a whiteboard,
marker, and cloth
• No calculators
7th Grade Math
Name all of the classifications out of the
six that we learned that can describe
the triangle below
Acute
Isosceles
7th Grade Math
Find the missing angle of the triangle
below
55°
7th Grade Math
Find the value of the variable below:
50°
x 60°
70°
7th Grade Math
Name all of the classifications out of the
six that we learned that can describe
the triangle below
Obtuse
Scalene
7th Grade Math
Find the value of the variable:
4x°
x = 18
x°
7th Grade Math
Name all of the classifications out of the
six that we learned that can describe
the triangle below
Right
Isosceles
7th Grade Math
What is the value of (y – x)?
x
30°
30°
y
7th Grade Math