## Silent Geometry

Students will practice using geometry formulas measuring items in the classroom to find area and volume, radius and circumference, and identify the types of angles.

**Objectives & Outcomes:**

Students will be able to find the area and volume of irregular shapes in the classroom.

**Lesson Activities:**

Opening to lesson:

1) Have the students go around the room and tell the teacher what they think each shape will be called for today's lesson. After receiving several answers, tell the students that the teacher will reveal the actual names of the shapes.

2) Place the objects around the room so the students can see them and their shape as the teacher calls out the name.

3) Next, tell the students that they will be using the area and volume formulas to measure and find the area and volume of each shape in the room.

4) The students use the formulas to record the amount of each shape in the room using the grid method. They record their answers in the blank shapes on the grid.

**Body of Lesson:**

Activity:

1) A "hot seating" activity will force the students to use the formulas to find the area and volume of irregular shapes in the classroom.

2) The teacher will show the students examples of each shape and a blank shape for each of the formulas.

3) Have the students use scrap paper to practice using the formulas.

4) When the students finish, they will place all scrap paper under a designated area to show they have completed the activity.

5) Students will place all scrap paper in a designated area. While they are working, the teacher can circulate and evaluate the students' answers.

6) Explain to the students the importance of rounding. Have the students round the answers that are close to an actual answer.

**Assessment and Evaluation:**

1) Students will need to demonstrate that they can find the area and volume of each shape independently without help from the teacher. If they receive help and the answer is incorrect, they must provide the correct answer.

2) The students will record their answers in the grid.

**Modification & Differentiation:**

1) In partners, have one student come to the front and find the area and volume of the object with the rest of the other students answering to check that the correct formulas are being used.

2) Allow students to use rulers instead of calculators.