Objective : Learn to find the area of a triangle.

Slides:

Advertisements

Similar presentations

Triangles, Quadrilaterals, Nets, Prisms & Composite Polygons

Advertisements

Triangular Pyramids. Surface Area Step 1: Find the area of the base of the pyramid. Step 2: Find the area of the 3 congruent triangles. Step 3: Add them.

10 m² 4 m =5 m( A = 5 m. The same formula (V = Bh) that is used to find the volume of rectangular prisms and cylinders, can also be used to find the volume.

Section 8.5. Find the area of parallelograms. Base of a parallelogram Height of a parallelogram Parallelogram Rhombus.

Volume of Triangular Prisms

Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle.

Holt CA Course Area of Parallelograms AF3.1 Use variables in expressions describing geometric quantities (e.g., P = 2w + 2l, A = bh, C =  d–the.

8-4 Area of Triangles and Trapezoids Learn to find the area of triangles and trapezoids.

Section aFind the area of a rectangle and a square. bFind the area of a parallelogram, a triangle, and a trapezoid. cSolve applied problems involving.

Volume of Pyramids and Cones. Suppose you have a square-pyramid-shaped container and a square-prism-shaped container, and the bases and heights are the.

Area of Triangles and Trapezoids base altitude base.

Solving Radical Equations

EXAMPLE 1 Find the volume of a solid Find the volume of the solid. V = Bh 1 3 = 36 m 3 a.a. = ( 4 6)(9)

Lesson 7-1 Area of Parallelograms, Triangles, and Trapezoids.

Shaded Area/ Word Problems

Areas of Polygons COURSE 3 LESSON 8-7 Find the area of each parallelogram. a.b. A = bh Use the area of a parallelogram formula. = (32) (20) = (15) (11)

Area of Quadrilateral.

EXAMPLE 1 Finding Area and Perimeter of a Triangle Find the area and perimeter of the triangle. A = bh 1 2 P = a + b + c = (14) (12) 1 2 =

Example 1 Find the Area of a Right Triangle Find the area of the right triangle. SOLUTION Use the formula for the area of a triangle. Substitute 10 for.

AREA OF A REGULAR POLYGON SECTION FIND THE AREA OF THE TRIANGLE BELOW 6 in.

Area of Complex Figures

Base of a parallelogram Height of a parallelogram Parallelogram Rhombus.

Areas of Parallelograms and Trapezoids Objective: Learn to find the area of parallelograms and trapezoids.

Area of a Parallelogram

Find the Area of a Square Example 1 Find the area of the square. SOLUTION Use the formula for the area of a square and substitute 9 for s. A = s 2 Formula.

Holt Algebra Solving Radical Equations Warm Up(Add to Hw) Solve each equation. 1. 3x +5 = x + 1 = 2x – (x + 7)(x – 4) = 0 5. x 2.

Entry Task Find the unknown side length in each right triangle with legs a and b and hypotenuse c. 1. a = 20, b = b = 21, c = 35 c = 29 a = 28.

EXAMPLE 3 Find the area of an isosceles triangle

Area of Triangles and Trapezoids

Triangles, Quadrilaterals, Nets, Prisms & Composite Polygons

ESSENTIAL QUESTION: How do you calculate the area of trapezoids?

Cell phone use is prohibited.

Students will find the area of triangles (10-2).

Area of a Triangle These two triangles are identical.

Find the area of each polygon or circle.

Areas of Parallelograms and Trapezoids

Areas of Parallelograms and Trapezoids

Theorem 12.9 Volume of a Pyramid

Area of a Rectangle = base x height

Area of Parallelograms and Triangles

ESSENTIAL QUESTION: How do you find the area of parallelograms?

Warm Up Find the volume of each figure. Round to the nearest tenth, if necessary. 1. a square prism with base area 189 ft2 and height 21 ft 2. a regular.

EXAMPLE 1 Find the volume of a solid Find the volume of the solid. a.

Section 11-5 Solving Radical Equations

Area and Perimeter of Composite Shapes

Objectives Learn and apply the formula for the volume of a prism.

Areas of Parallelograms and Triangles

Volume of Pyramids TeacherTwins©2014.

Area of Parallelograms

Area of Trapezoids.

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

Finding the Area of Right Triangles

Area of Right Triangles

Area of Triangles and Trapezoids

Area of a Trapezoid.

Warm Up Solve each equation

Multiplying Integers SAME SIGNS??? Answer will be POSITIVE. ex)

The volume of a three-dimensional figure is the number of cubes it can hold. Each cube represents a unit of measure called a cubic unit.

Area of Triangles and Trapezoids

Finding the Area of Triangles

Area of Right Triangles

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

By- Sabrina,Julianna, and Killian

Areas of Parallelograms and Trapezoids

Area of Parallelograms and Triangles

Area of Complex Figures

Finding missing side -triangle.

Presentation transcript:

Objective : Learn to find the area of a triangle. Areas of Triangles Objective : Learn to find the area of a triangle.

Area of Triangles To find the area of a triangle, you have to multiply the base by the height, and then divide by 2. Area = base × height 2 or A = b × h

Examples: Example 1: Find the area of the triangle: Steps to finding the area of a triangle: Copy the formula. Substitute the numbers in the formula. 3. Multiply the base and the height. 4. Divide your answer by 2. Write the answer with the unit2 . A = b × h 2 A = 4cm × 6cm A = 24 cm2 A = 12 cm2

Your Examples: Your examples: Find the area of the triangle: 1. 2.

Homework: Find the area of each triangle. 1. b= 25 ft h= 4 ft 2. b= 14 in h= 6 in 3. b= 10 yd h= 8 yd 4. b= 12 m h= 5 m 5. b= 7 cm h= 8 cm 6. 9. 7. 10. 8.