Lesson 5 Homework Practice Area Of Composite Figures Calculator

Notes:

  • Before this lesson make copies of the parallelograms and trapezoids.
  • I give each student a copy of these shapes and a pair of scissors.
  • I remove the words in italics on students’ notes before I print them.

I want students to take time to figure out a strategy to find the area of the parallelograms and trapezoids.  Some students will split a parallelogram into two triangles and a rectangle to find the area.  Other students may count the whole squares and ½ squares.  Other students may recognize they can move one of the triangles to the other side of the shape to create a rectangle to find the area.  Students are engaging in MP8: Look for and make sense of repeated reasoning.

For the trapezoids some students may create two triangles and a rectangle.    Some struggling students may try to estimate the area by counting whole squares and partial squares.  Other students may recognize that with trapezoid III they can move a triangle to create a rectangle, although this strategy does not work with the other trapezoids. 

I choose students to share their strategies under the document camera.  I look for a student who created rectangles and triangles.  I also look for a student who moved a triangle to create a rectangle.  If no one uses this strategy I cut out the parallelogram and show them.

When I define parallelogram I also introduce the formula for area of base times height.  When I introduce the trapezoid I do not introduce a formula.  I find that many students get confused with this formula.  Instead, I encourage students to break trapezoids up into triangles and a rectangle/square.

Если ты хочешь назначить мне свидание, я освобожусь. Если же нет, то позвони электрикам. - Джабба, дело очень серьезное. У меня чутье. У нее чутье.

Categories: 1

0 Replies to “Lesson 5 Homework Practice Area Of Composite Figures Calculator”

Leave a comment

L'indirizzo email non verrà pubblicato. I campi obbligatori sono contrassegnati *