In our daily lives, we often work with the concept of days. A day is a unit of time that is approximately based on the period of time during which the Earth completes one rotation on its axis. Understanding how to calculate and work with days is important for various tasks, such as planning schedules, calculating interest, and determining durations.

A day is typically defined as a 24-hour period, consisting of 24 hours. It is further divided into smaller units, such as hours, minutes, and seconds, for more precise time measurement.

To calculate days, we can use the following formulas:

**Days to Hours:**Number of days * 24 hours/day = Total hours**Days to Minutes:**Number of days * 24 hours/day * 60 minutes/hour = Total minutes**Days to Seconds:**Number of days * 24 hours/day * 60 minutes/hour * 60 seconds/minute = Total seconds

Here are some key concepts to focus on when studying days:

- Understanding the relationship between days, hours, minutes, and seconds.
- Converting between days and other units of time using the appropriate conversion factors.
- Applying the concept of days to solve real-world problems, such as calculating the duration of an event or determining interest over a certain period of time.

Practice using the formulas and conversion factors to become comfortable with calculating and working with days in various contexts.

Remember to review the material regularly and seek additional help or resources if needed.

Study GuideSimilarity and scale Worksheet/Answer key

Similarity and scale Worksheet/Answer key

Similarity and scale Worksheet/Answer key

Similarity and scale Worksheet/Answer keyUsing Similar Polygons Worksheet/Answer keySimilar Polygons Worksheet/Answer keyUsing Similar Polygons Worksheet/Answer keySimilar Polygons

Number and Operations (NCTM)

Understand numbers, ways of representing numbers, relationships among numbers, and number systems.

Understand and use ratios and proportions to represent quantitative relationships.

Compute fluently and make reasonable estimates.

Develop, analyze, and explain methods for solving problems involving proportions, such as scaling and finding equivalent ratios.

Geometry (NCTM)

Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships.

Understand relationships among the angles, side lengths, perimeters, areas, and volumes of similar objects.

Create and critique inductive and deductive arguments concerning geometric ideas and relationships, such as congruence, similarity, and the Pythagorean relationship.

Apply transformations and use symmetry to analyze mathematical situations.

Describe sizes, positions, and orientations of shapes under informal transformations such as flips, turns, slides, and scaling.

Measurement (NCTM)

Apply appropriate techniques, tools, and formulas to determine measurements.

Solve problems involving scale factors, using ratio and proportion.

Grade 8 Curriculum Focal Points (NCTM)

Geometry and Measurement: Analyzing two- and three-dimensional space and figures by using distance and angle

Students use fundamental facts about distance and angles to describe and analyze figures and situations in two- and three-dimensional space and to solve problems, including those with multiple steps. They prove that particular configurations of lines give rise to similar triangles because of the congruent angles created when a transversal cuts parallel lines. Students apply this reasoning about similar triangles to solve a variety of problems, including those that ask them to find heights and distances. They use facts about the angles that are created when a transversal cuts parallel lines to explain why the sum of the measures of the angles in a triangle is 180 degrees, and they apply this fact about triangles to find unknown measures of angles. Students explain why the Pythagorean Theorem is valid by using a variety of methods - for example, by decomposing a square in two different ways. They apply the Pythagorean Theorem to find distances between points in the Cartesian coordinate plane to measure lengths and analyze polygons and polyhedra.