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FRAME THE LESSON
TEACHER:
6th
CLASS: Math
LESSON DATE: 4th 6 week (week 3) Feb. 8-12 (week 22) M T W TH F
Teaching Points & Activities****Friday Free Food day****
Student Expectations Bundled in Lesson
Noun=Underline
Verb=Italicize
6.8(A) Extend previous knowledge of triangles and
their properties to include the sum of angles of a
triangle, the relationship between the lengths of sides
and measures of angles in a triangle, and determining
when three lengths form a triangle
Engage:
Explore:
Explain:
Elaborate:
Evaluate:
Objective/Key Understanding:
6.8(A) SWBAT extend previous knowledge of triangles and
their properties including determining when three lengths
form a triangle.
6.8(A)SWBAT extend previous knowledge of triangles and
their properties to include the sum of angles of a triangle.
6.8(A) SWBAT extend previous knowledge of triangles and
their properties to the relationship between the lengths of
sides and measures of angles in a triangle.
Stop & Check for Understanding—High Level Questions
How do the lengths of the line segments affect the shape of a triangle?
What is another way to check whether three segments can forma triangle?
How does the relationship between three side lengths determine whether those lengths could be side of
triangle?
Small Group Purposeful Talk Question Stems:
If three side do not form a triangle, how many sides do you need to change? (Only 1 side)
Closing Product/ Question/ Informal Assessment:
Module 15.1-15.3 Online quizzes Go Math
Resources/Materials:
Engage: Unit 5 Vocabulary Preview- Word search (pg 418) Real World video- Go Math Module 15 Triangles around
us. Are you ready? Pg 420. (assess prior knowledge) Reading Start up pg 421. TW Ask what are the 3 three different
angles? Play Simon says with the angles.
Can you form a triangle using any three line segments?
What is true for all types of triangles?
Explore: Can you form this triangle? Use the ruler and your journal to construct a triangle with the side lengths of 3
cm, 8 cm, and 4 cm. (This triangle cannot be formed.) Explore activity 15.1 pg 423-424.
SW cut out a rectangle/ square, label the angles and place the measures of each angle inside the rectangle. What is
the angle sum of your rectangle?(360 degrees) What if you cut it in ½ diagonally, what would the sum of the angles
be and what new shape/polygon did you create? (triangle, 180 degrees)
Explore 15.2 and 15.3
Explain: SW will use this model every time to prove if answer are true: A+B>C; B+C>A; & A+C>B. Use animated
Math and interactive white board. Reteach how to solve using algebraic inequalities. TW teach how to solve for
missing angles using an equation to solve for missing angles. Student must first create the equation, then solve the
equation on both side in order to isolate the variable or missing angle.
SW create a triangle flip book that include pictures, triangles, and definitions. Hint: some triangle have more than
one name. Right triangle, obtuse triangle, acute triangle, isosceles triangle, equilateral triangle, scalene triangle.
Elaborate: TW Create a playing card game using 24 index cards. Write numbers 3,4,5,6,8,10,12 and 13 on the cards.
Players are dealt three cards. SW determine if a triangle can be formed by the 3 sides given.
Guided practice and independent practice 15.1-15.3. Game: Play name that triangle: TW project different types of
triangle one at a time. Groups will name each triangle with all possible names.
Evaluate: Lesson quiz 15.1-15.3. TW need to create exit tickets to evaluate mastery for the other days. Use GO Math
online Quizzes to assess over 15.1-15.3. (Module Quiz pg. 441)
How do you find the measure of the third angle in a triangle if you know the measure of two
of the angles?
Why is it unnecessary to know the base of triangle when you are solving for a missing angle?
You know the measures of two angles of a triangle. How do you find the measure of the third
side?
Vocabulary:
Line segments, vertices (vertex), acute angle, obtuse angle, right angle, straight angle. Triangles:
Right triangle, obtuse triangle, acute triangle, isosceles triangle, equilateral triangle, scalene
triangle.
Go Math
Module 15
Critical Writing Prompt:
How can you use angles, triangles, and
equations to solve real- world problems?
How can you use the relationship
between side lengths to determine when
three lengths form a triangle?
How do you use the sum of angles in a
triangle to find an unknown angle
measures?
How can you use the relationship
between side lengths and angle measures
in a triangle to solve problems?
Rigor & Relevance: (Real World Connection)
Theater set Construction: A person who
works in the theater set construction works
with the set designer to create scenery and
needs technical precision when scaling and
building sets based on the dimensions of the
models.
A map of a new dog park show that it is
triangular and that the sides measure 18 yd,
37 yd, and 17 yd. Are the dimension’s
possible?