Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we...

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Area of Triangles Return to table of contents

Transcript of Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we...

Page 1: Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we did for the rectangle & parallelogram. How many 1 ft.

Area of Triangles

Return to table of contents

Page 2: Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we did for the rectangle & parallelogram. How many 1 ft.

Area of a Triangle

Let's use the same process as we did for the rectangle &

parallelogram. How many 1 ft2 tiles fit across the

bottom of the triangle?

Page 3: Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we did for the rectangle & parallelogram. How many 1 ft.

Area of a Triangle

If we continue to build the triangle with rows of 10 ft2,

what happens?

How tall is the triangle? How can you tell?

10 ft

Page 4: Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we did for the rectangle & parallelogram. How many 1 ft.

How does this help us find the area of the triangle?

Find the area of the rectangle, then divide by 2

20 ft2

See that the rectangle we built is twice as large as the triangle. How do you find the area of a triangle?

10 ft

4 ft

Page 5: Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we did for the rectangle & parallelogram. How many 1 ft.

Is this true for all triangles?Let's see!

Calculating base(height) results in 2 triangles!

Page 6: Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we did for the rectangle & parallelogram. How many 1 ft.

The Area (A) of a triangle is found by using the formula:

Note: The base & height always form a right angle!

Page 7: Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we did for the rectangle & parallelogram. How many 1 ft.

Example.

Find the area of the figure.

4 cm

10 cm 10 cm

6 cmclick to reveal

Page 8: Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we did for the rectangle & parallelogram. How many 1 ft.

Try These.

Find the area of the figures.

13 ft

11 ft

9 ft 12 ft 1420

16

15

click to reveal click to

reveal

Page 9: Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we did for the rectangle & parallelogram. How many 1 ft.

73 Find the area.

8 in

5 in

11 in 10 in

Page 10: Area of Triangles Return to table of contents. Area of a Triangle Let's use the same process as we did for the rectangle & parallelogram. How many 1 ft.

74 Find the area

15 m

8 m9 m 12 m


DLP Area of Rectangle

DLP Area of Rectangle

Exploring Area of Polygons. Exploring the Area of a Parallelogram Objective: Students will derive the formula for the area of a parallelogram. Materials:

Exploring Area of Polygons. Exploring the Area of a Parallelogram Objective: Students will derive the formula for the area of a parallelogram. Materials:

Shape and space quadrilateral & symmetry. content square square Rectangle Rectangle rhombus rhombus Parallelogram Parallelogram Trapezium Trapezium Kite.

Shape and space quadrilateral & symmetry. content square square Rectangle Rectangle rhombus rhombus Parallelogram Parallelogram Trapezium Trapezium Kite.

Objective - Mrs. Meyer's Math Site · triangle Lesson Vocabulary The area of a rectangle is the product of its base and height. A = bh Theorem 10-2 Area of a Parallelogram The area

Objective - Mrs. Meyer's Math Site · triangle Lesson Vocabulary The area of a rectangle is the product of its base and height. A = bh Theorem 10-2 Area of a Parallelogram The area

Vocabulary Square Parallelogram Pair Parallel Pair of equal sides Rectangle Rhombus Quadrilateral Trapezoid.

Vocabulary Square Parallelogram Pair Parallel Pair of equal sides Rectangle Rhombus Quadrilateral Trapezoid.

Find the perimeter and area of each parallelogram or ......If the area of the parallelogram is 36 square centimeters, find its base and height. 62/87,21 The area of a parallelogram

Find the perimeter and area of each parallelogram or ......If the area of the parallelogram is 36 square centimeters, find its base and height. 62/87,21 The area of a parallelogram

Area of a triangle and parallelogram

Area of a triangle and parallelogram

Area of a rectangle

Area of a rectangle

Find Area of Parallelogram - Basic

Find Area of Parallelogram - Basic

Chapter 11 Length and Area. 11.1 Areas of Triangles and Parallelograms Area of a square = s 2 Area of a rectangle = bh Area of a parallelogram = bh Area.

Chapter 11 Length and Area. 11.1 Areas of Triangles and Parallelograms Area of a square = s 2 Area of a rectangle = bh Area of a parallelogram = bh Area.

Parallelograms and Rectangles. Quadrilateral Definitions Parallelogram: opposite sides are parallel Rectangle: adjacent sides are perpendicular.

Parallelograms and Rectangles. Quadrilateral Definitions Parallelogram: opposite sides are parallel Rectangle: adjacent sides are perpendicular.

Visualizing the area of rectangle

Visualizing the area of rectangle

CHAPTER 8 Perimeter, Area, and Volume...length and height as the original parallelogram. So a parallelogram has the same area as a rectangle with the same base length and height. Using

CHAPTER 8 Perimeter, Area, and Volume...length and height as the original parallelogram. So a parallelogram has the same area as a rectangle with the same base length and height. Using

Advanced Geometry. First you must prove or be given that the figure is a parallelogram, then A PARALLELOGRAM is a rectangle if… 1. It contains at least.

Advanced Geometry. First you must prove or be given that the figure is a parallelogram, then A PARALLELOGRAM is a rectangle if… 1. It contains at least.

Lesson 1: The Area of Parallelograms Through Rectangle Facts...and height, and calculate the area of each parallelogram. a. b. c. 3. If the area of a parallelogram is 35 42 cm2 and

Lesson 1: The Area of Parallelograms Through Rectangle Facts...and height, and calculate the area of each parallelogram. a. b. c. 3. If the area of a parallelogram is 35 42 cm2 and

AREA OF SQUARE/ RECTANGLE

AREA OF SQUARE/ RECTANGLE

Quadrilaterals Properties of a parallelogram, a rectangle ...math.buffalostate.edu/~it/projects/Ventura.pdf · Quadrilaterals Properties of a parallelogram, a rectangle, ... angle

Quadrilaterals Properties of a parallelogram, a rectangle ...math.buffalostate.edu/~it/projects/Ventura.pdf · Quadrilaterals Properties of a parallelogram, a rectangle, ... angle

1 EXPLORATION: Identifying Special Quadrilaterals · A rhombus is a A rectangle is a A square is a parallelogram parallelogram with parallelogram with with four congruent sides four

1 EXPLORATION: Identifying Special Quadrilaterals · A rhombus is a A rectangle is a A square is a parallelogram parallelogram with parallelogram with with four congruent sides four

AREA OF A PARALLELOGRAM: AREA OF A TRIANGLE: AREA OF … · 10.1-10.3 Review Name _____ AREA OF A PARALLELOGRAM: AREA OF A TRIANGLE: AREA OF AN EQUILATERAL TRIANGLE: AREA OF A RHOMBUS:

AREA OF A PARALLELOGRAM: AREA OF A TRIANGLE: AREA OF … · 10.1-10.3 Review Name _____ AREA OF A PARALLELOGRAM: AREA OF A TRIANGLE: AREA OF AN EQUILATERAL TRIANGLE: AREA OF A RHOMBUS:

11.1 Areas of Triangles and Parallelograms · 11.1 Areas of Triangles and Parallelograms . Parallelogram . Parallelogram . Hwk p. 723 (3-27, odd) THEOREM 11.1 Area of a Rectangle

11.1 Areas of Triangles and Parallelograms · 11.1 Areas of Triangles and Parallelograms . Parallelogram . Parallelogram . Hwk p. 723 (3-27, odd) THEOREM 11.1 Area of a Rectangle