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Published byBlaise Stevenson
Modified over 6 years ago
Finding the Area of Polygons
Vocabulary Perimeter – The sum of all sides of the shape. Area – The total occupied space of a shape in units squared.
Area of Triangles Base (b) Height (h)
We know how to find the area of a square or a rectangle
What if we cut the shapes in half?
Example = = 12 units squared
Notice all of our examples have been right triangles In other triangles, you must make sure you are using the height. Height is always perpendicular to the base
Find the Area 3 in 7 in 5 in
Find the Area 6 in 12 in 10 in
….and these guys make millions…
Finding the Area of Other Polygons
We Know How to Find the Area of Several Figures Already
Finding the area of a rhombus and parallelogram They are just squares and rectangles pushed over Area = 4 un² Notice that we are not using the length of the angled side! 3
Trapezoid Formula for area
Area of Other Polygons
Sometimes Things Are Not Perfect or We are Missing Vital Information Divide the shape into shapes we can use
2 2 3
Closure: With a partner find the area 3 5 6 4
Area and Perimeter By Christine Berg Edited by V T Hamilton.
UNIT 8:FORMULA By: Grace Silverstein, and Samantha Stoeber!
Chapter 6+. The opposite sides of a parallelogram are __________ and __________.
1. A kite has two diagonals. We’ll label them. 2. The diagonals in a kite make a right angle. 3. Let’s put a rectangle around the kite because we know.
TODAY IN GEOMETRY… Review: Pythagorean Theorem and Perimeter Learning Target: You will find areas of different polygons Independent practice.
1 Lesson Areas of Polygons. 2 Lesson Areas of Polygons California Standard: Measurement and Geometry 1.2 Use formulas routinely for finding.
What is a QUADRILATERAL?
Parallelograms, Trapezoids and Triangles Section
Area of 2D shapes. Quadrilaterals A quadrilateral is a geometric figure that is made up of four line segments, called sides, that intersect only at their.
Finding the Area of a Basic Figure Developing the Area formulae for Squares, Rectangles, Parallelograms, Triangles, and Trapezoids. Square Parallelogram.
Perimeter How do we find the perimeter of a quadrilateral? Standards: M5P3, M5P4, and M5A1c.
Unit 10 Review Area Formulas. FOR EACH FIGURE: IMAGINE the shape THINK of its AREA FORMULA.
Intro to Geometry in 2D These are your notes for Area of 2 Dimensional figures…Write & Draw EVERY detail as if I was at the front of class. Write down.
Warm-Up Find the area and perimeter of the rectangle
Bell Work Find the area of each figure. 5 in 9 in 13 in 6 in 16 in 22 in 10 in A = (13 + 9) 5 A = 11 5 A = (22) 5 A = 55 in² A = ( ) 10 A =
Polygons with 4 sides and 4 angles
Areas of Triangles, Parallelograms, & Trapezoids.
Area & Perimeter Perimeter The distance around a shape – The sum of the lengths of all the sides in a shape – Measured in units of length i.e. Feet,
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