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Chapter 5: Measurement

This guide covers fundamental concepts in geometry, including definitions of key terms like height, base, area, and perimeter. Learn how to calculate the area of a rectangle using the formula: Area = length x width, and the perimeter with Perimeter = 2l + 2w. We also explore parallelograms, where the area is found using Area = base x height. Additionally, we clarify the importance of right angles and the usage of base and height in different shapes. This resource is ideal for homework assistance and geometry review.

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Chapter 5: Measurement

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  1. height – a line segment drawn to form a right angle with one side of a shape. base – the side of a shape that is measured to calculate the area or perimeter of the shape; any side of a shape can be the base of the shape. Formula- A rule in the form of an equation Chapter 5: Measurement

  2. Any questions from the homework? • How to determine the area of a rectangle. • Rectangle - Area = length x width • How to determine the perimeter of a rectangle? • Perimeter = 2l + 2w Review

  3. parallel – lines that are across from each other and are the same length apart. • perpendicular – lines that meet or cross at a right angle (90°) • rhombus - a parallelogram with 4 equal sides Important definitions

  4. Length? • Width? • Base? • Height? • We use length and width when we are referring to a rectangle • We use base and height when we are referring to a parallelogram Base and height

  5. How do you determine which side is the base and which side is the height in a shape? • The height is perpendicular to the base. This means that it forms a right angle at the base • What is a right angle? • 90 degree angle • Look on page 195 for an example Area of a parallelogram

  6. Copy: Parallelogram: Area = base x height Area of a parallelogram

  7. Calculate the area of parallelogram Base? Height? Base- 5.0 cm Height- 2.4 cm Practice Area = base x height 5.0 cm x 2.4 cm= 12.0 cm 2

  8. Page – 197 – 199 # 1,2,5,8,9,11b Class work + Homework

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