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MIDDLE SCHOOL

Mathematics (Grade 7)

Geometry

Scale Drawings and Proportional Geometry

What Is a Scale Drawing?
01:27
What Is a Scale Drawing?

A scale drawing represents an actual object at a different size while keeping the same shape. Every corresponding length changes by the same scale fac

Video Duration: 1 minute and 27 seconds
Identifying the Scale Factor
01:25
Identifying the Scale Factor

A scale factor is the number used to multiply every corresponding length when an object or drawing is enlarged or reduced.

Video Duration: 1 minute and 25 seconds
Finding Actual Lengths from a Scale Drawing
01:19
Finding Actual Lengths from a Scale Drawing

A scale drawing represents a real object or space at a smaller or larger size. The given scale connects each drawing length to its corresponding actua

Video Duration: 1 minute and 19 seconds
Finding Drawing Lengths from Actual Measurements
01:17
Finding Drawing Lengths from Actual Measurements

A scale can be used to convert an actual measurement into a length on a drawing. A proportion keeps the drawing and actual measurements in the same ra

Video Duration: 1 minute and 17 seconds
Comparing Scaled Drawings
01:24
Comparing Scaled Drawings

Two scale drawings of the same object can have different sizes because each drawing may use a different scale. Their actual measurements must be found

Video Duration: 1 minute and 24 seconds
Finding Missing Distances in Scaled Figures
01:28
Finding Missing Distances in Scaled Figures

Scaled figures have the same shape, and their corresponding measurements form equal ratios. These ratios can be used to find an unknown distance.

Video Duration: 1 minute and 28 seconds

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Constructing and Analyzing Geometric Figures

Uniqueness of Triangle Construction I
01:23
Uniqueness of Triangle Construction I

The Side-Side-Side, or SSS, condition describes a triangle when the lengths of all three sides are known. Before applying this condition, the side len

Video Duration: 1 minute and 23 seconds
Uniqueness of Triangle Construction III
01:20
Uniqueness of Triangle Construction III

Some combinations of side lengths or angle measures make it impossible to construct a triangle. Checking the given measurements helps recognize when n

Video Duration: 1 minute and 20 seconds
Impossible Triangle Conditions
01:29
Impossible Triangle Conditions

The interior angles of a triangle follow a fixed mathematical relationship. Before attempting to construct a triangle from three given angle measures,

Video Duration: 1 minute and 29 seconds

Cross-Sections of Three-Dimensional Figures

Understanding Cross-Sections
01:25
Understanding Cross-Sections

A cross-section is a two-dimensional figure formed when a plane cuts through a three-dimensional solid. Its shape depends on the solid and the positio

Video Duration: 1 minute and 25 seconds

Understanding Probability and Chance

What Is Probability?
01:17
What Is Probability?

Many events have outcomes that cannot be known for certain before they happen. Probability is a measure of how likely an event is to happen and provid

Video Duration: 1 minute and 17 seconds