1. Topic-
|
|
|
2. Content-
|
| Triangles, attributes, right triangle |
| |
|
3. Goals: Aims/Outcomes-
|
At the end of this lesson, students will understand triangles: 1.
can have 0, 2, or 3 sides that are the same length 2. with a right
angle is called a right triangle
Essential Question: How can geometric shapes help me solve real-world
problems? |
| |
|
|
4. Objectives-
|
Describe and classify triangles by their attributes.
Students should be able to describe a triangle based on the number
of sides of equal length and the types of angles that it has.
|
| |
|
5. Materials and Aids-
|
Text, pencils, rulers, index cards 1 per student, square pieces
of paper.
Brain Pop, computer, elmo |
| |
|
6. Procedures/Methods-
|
|
A. Introduction-
1. write the term "right triangle" on the board. Ask students what
they know about the term.
2. ask students to look at p. 845 and ask if they know what the symbol
for a right angle is.
3. Have students draw examples on the board. |
| |
|
|
B. Development-
1. Measure It- use inch ruler to measure sides of triangles to quarter
inch.
2. Talk about It-Discuss exercises to develop further understanding
that a triangle's side length is one attribute that will help classify
it.
|
| |
|
|
C. Practice-
1. Try It-students will use index card to check the angle of the
sail on p. 846. Point out that right angles can be on the left or
right side of the triangle.
2. Remind students a triangle with one right angle is called a right
triangle.
3. Guide students in studying the angles mdd by the 3 triangles. Ask
for descriptions. Is one right? Which one? How do you know?
4. 4-6 discuss attributes of triangles including right angle. |
| |
|
|
D. Independent Practice-
Complete p. 847-848, 7-19
the exercises will reinforce problem-solving skills, recognition of
right triangles, and classification of triangles based on their attributes.
|
| |
|
|
E. Accommodations (Differentiated Instruction)-
1-1 assistance
small group
visual reminders of right angle, right angle |
| |
|
|
F. Checking for understanding-
continuous monitoring of workbook responses
strategic questions, how do you check for a right angle (corner of
note card) ask for an attribute of a triangle |
| |
|
|
G. Closure-
| Review Apply It And Write About It P. 848 |
| |
|
7. Evaluation-
|
Formative Assessment: Can a triangle have 2 sides of equal length
and have an angle greater than a right angle?
Can a triangle have 2 angles greater than than a right angle? |
| |
|