Find the area. Complete in your notebook. 1. 6in 9in
Slide 3
5 Minute Check Find the area. Complete in your notebook. 1. 6in
9in 9 in 6in = 54 in
Slide 4
5 Minute Check Find the area. Complete in your notebook. 2.
13.5ft 2.5ft
Slide 5
5 Minute Check Find the area. Complete in your notebook. 2.
13.5ft 2.5ft 13.5 ft 2.5 ft = 33.75 ft
Slide 6
5 Minute Check Find the area. Complete in your notebook. 3.
1.2cm 9.8cm
Slide 7
5 Minute Check Find the area. Complete in your notebook. 1.2 cm
9.8 cm = 11.76 cm 3. 1.2cm 9.8cm
Slide 8
5 Minute Check
Slide 9
Slide 10
Friday, March 6 Chapter 6.9.1/6.9.2 Area of Parallelograms And
Triangles
Slide 11
Area of Parallelograms Objective: To find areas and missing
dimensions of parallelograms and triangles.
Slide 12
Area of Parallelograms A polygon is a closed figure formed by 3
or more straight lines.
Slide 13
Area of Parallelograms A polygon is a closed figure formed by 3
or more straight lines. A quadrilateral is a polygon with 4
sides.
Slide 14
Area of Parallelograms A polygon is a closed figure formed by 3
or more straight lines. A quadrilateral is a polygon with 4 sides.
A triangle is a polygon with three sides.
Slide 15
Area of Parallelograms A parallelogram is a quadrilateral with
opposite sides parallel and equal in length.
Slide 16
Area of Parallelograms A rhombus is a parallelogram with all
equal sides.
Slide 17
Area of Parallelograms The area A of a parallelogram is the
length l multiplied by the height h. A = lh The length and height
must be perpendicular to each other. Connected by a 90 angle. h
l
Slide 18
Area of Parallelograms A formula is an equation that shows a
relationship among certain quantities. The formula to find the area
of a parallelogram is A = lh
Slide 19
Area of Parallelograms What is the area of the
parallelogram?
Slide 20
Area of Parallelograms What is the area of the parallelogram? A
=lh l = ?
Slide 21
Area of Parallelograms What is the area of the parallelogram? A
=lh l = 6 h = ?
Slide 22
Area of Parallelograms What is the area of the parallelogram? A
=lh l = 6 h = 8 What is the area?
Slide 23
Area of Parallelograms What is the area of the parallelogram? A
=lh l = 6 h = 8 What is the area? A = 6 8 = 48 units or 48u
Slide 24
Area of Parallelograms What is the area of the parallelogram?
Do this on your own.
Slide 25
Area of Parallelograms What is the area of the parallelogram? l
= 20cm h = 11cm A = 11cm 20cm = 220cm
Slide 26
Area of Parallelograms What is the area of the parallelogram?
Do this on your own.
Slide 27
Area of Parallelograms What is the area of the parallelogram? l
= 4m h = 16m A = 4m 16m = 64m
Slide 28
Area of Parallelograms Find the area of the parking space.
Slide 29
Area of Parallelograms
Slide 30
Find the area of the shaded region. Do this on your own.
Slide 31
Area of Parallelograms Find the area of the shaded region. Area
of the rectangle 25 11 = 275ft Area of the parallelogram 4 12 =
48ft The area of the shaded region is the area of the rectangle
minus the area of the parallelogram, 275ft - 48ft = 227ft
Slide 32
Area of Parallelograms Find the area of the shaded region.
Slide 33
Area of Parallelograms Find the area of the shaded region. Area
of the square 6 6 = 36cm Area of the parallelogram 15 8 = 120cm The
area of the shaded region is the area of the parallelogram minus
the area of the square, 120cm - 36cm = 84cm
Slide 34
Area of Parallelograms What is the height of the parallelogram
if the area is 32 in? 8 in
Slide 35
Area of Parallelograms
Slide 36
What is the length of the parallelogram if the area is 17.85
cm?
Slide 37
Area of Parallelograms
Slide 38
Area of Triangles
Slide 39
The formula for the area of a triangle is h h l b The base of a
triangle is the same as the length of a parallelogram or
rectangle.
Slide 40
Area of Parallelograms The base is the same as length. I prefer
to use the term length, but most formulas use base. The base in
this instance has a lower case b.
Slide 41
Area of Triangles Find the area of the triangle. Do this on
your own.
Slide 42
Area of Triangles Find the area of the triangle. A = A =
12u
Slide 43
Area of Triangles Find the area of the triangle. Do this on
your own.
Slide 44
Area of Triangles
Slide 45
Find the area of the triangle. Do this on your own.
Slide 46
Area of Triangles 38.72m
Slide 47
Area of Triangles Consuela made a triangular box as shown. What
is the area of the top of the box? Do this on your own.
Slide 48
Area of Triangles
Slide 49
What is the area of the white section in the flag? Do this on
Your own.
Slide 50
Area of Triangles
Slide 51
If the area of a triangle is 245 in and the height is 14 in,
what is the base?
Slide 52
Area of Triangles
Slide 53
If the area of a triangle is 256.5 cm and the length is 27 cm,
what is the height?
Slide 54
Area of Triangles
Slide 55
Area of Parallelograms Is a square a parallelogram? Why is the
formula to find the area of a rectangle the same as the formula to
find the area of a parallelogram?
Slide 56
Area of Parallelograms Is a square a parallelogram? Why is the
formula to find the area of a rectangle the same as the formula to
find the area of a parallelogram? A parallelogram is just a
rectangle where a part has been moved.
Slide 57
Area of Triangles Is a square a parallelogram? Why is the
formula to find the area of a triangle half of the formula to find
the area of a rectangle?
Slide 58
Area of Triangles Is a square a parallelogram? Why is the
formula to find the area of a triangle half of the formula to find
the area of a rectangle? A rectangle is just two congruent
triangles.
Slide 59
Area of Parallelograms Is a square a parallelogram? If x = 5
and y, x, which figure has a greater area? Explain.
Slide 60
Area of Parallelograms Is a square a parallelogram? If x = 5
and y, x, which figure has a greater area? Explain. The rectangle;
The area of the rectangle is 5y units. Since the height of the
parallelogram is less than y, the area must be less than 5y
units.
Slide 61
Area of Parallelograms Agenda Notes Homework Homework
6.9.1/6.9.2 Due Monday, March 9 Mid-Chapter 6.9 Quiz Tuesday, March
10