1. Geometry Review
Part 2

2. TRIANGLES Right Equilateral Obtuse - all equal sides Isosceles Acute
In regards to ANGLES
Right
-Has 1 right angle
Obtuse
-Has 1 obtuse angle
Acute
-Has all acute angles
In regards to SIDES
Equilateral
- all equal sides
Isosceles
- 2 equal sides
Scalene
No equal sides
The hypotenuse of a right triangle will never equal the length of one of the legs. The legs form the right angle.

3. Volume Basic formula that works for anything:
Number of cubic units in an object.
Label =
units3
Basic formula that works for anything:
Area of the Base x Height=Volume

4. More Volume information
All of the bases of a geometric prism need to be the same exact size and shape until we study other shapes later.
A cube has layers of squares.
A rectangular prism has layers of rectangles
A triangular prism has layers of triangles
A cylinder has layers of circles.

5. Cube A 4 x 4 = 16 x 4 = 64 Draw the picture
What type of base does it have?
A square, find its area.
Are all the Layers the same?
How many Layers are there?
How do you finish the volume now?
4 x 4 = 16 x 4 = 64 A
4 in

6. Rectangular Prism 6 3 Draw the picture
What type of base does a rectangular prism have?
A rectangle
Find the area of the rectangle;
4 x 3 = 12
How many layers of those rectangles are there? 6
Finish finding the volume now.
4 x 3 = 12 is the area of the base. Take 12 x 6 =72 that is multiplying by the height. 6 3
4 in

7. Cylinders Draw the picture. What type of base does it have?6m 10
Draw the picture.
What type of base does it have?
Circle, find the area of it. A = 3.14 x R2
3.14 x 9 = 28.26
How many layers of circles are there?
10, find the volume.
Area of the Base =
3.14 x 9 = 28.26
Times the height:
28.26 x 10 = m3

8. Triangular prism Draw the picture
It takes layers of what shape the same size to make this?
Triangles
Find the area of that triangle.
3 x 4/2 = 6
How many layers of triangles were there?
10, now find the volume 3 5
10 m 4
Area of the base= 3x4/2=6
Multiple by the H = 6 x 10 = 60 m3

9. Volume Application Is volume used in everyday life?
How is it used and who uses it?
Let’s review:
Volume is the Area of the Base x Height
Not L x W x H that only works for some things.