### We found 5,653 reviewed resources for using formulas

Lesson Planet

#### How Do You Solve a Problem Using an Angle of Elevation?

In this problem you are given an angle of elevation and one side of a right triangle to find a missing side. Watch the instructor explain how to use the tangent ratio formula to solve this problem.

Lesson Planet

#### How Do You Solve a Decimal Inequality Using Subtraction?

Isolate the variable to solve any equation. This equation happens to be an inequality but is solved no different than if it were just an equation. Use the subtraction property of inequality to solve this given problem. The numbers are...

Lesson Planet

#### How Do You Factor a Polynomial Using Sum of Cubes?

Factor a binomial using the sum of cubes method. The strategy here is to rewrite each of the expressions in the binomial as a term cubed. That's just two steps. Ok. Wait! There is a formula that is used to finish factoring the binomial....

EngageNY

#### Proving the Area of a Disk

Using a similar process from the first lesson in the series of finding area approximations, a measurement resource develops the proof of the area of a circle. The problem set contains a derivation of the proof of the circumference formula.

Lesson Planet

#### Surface Area of a Cube

Transforming equations lets you see quantities in a different light. Scholars rewrite the formula for the surface area of a cube. The new equation focuses on the edge length of the cube.

Lesson Planet

#### Finding Half Life

When will half of the substance be gone? Using the exponential decay formula, the video finds the half-life of radium-226. The 29th installment in a 31-part series goes on to discuss that the calculations are the same independent of the...

Lesson Planet

#### How to Read Math

Math has a language all its own. A well-designed video explains the mathematical language related to equations and formulas. The instructor uses common language to describe the symbols and operations people expect to see when working...

Lesson Planet

#### Rate and Slope

At this rate, class members will be experts on the slope formula in no time. By viewing a short video, pupils first learn what a rate of change means in a real-world context. They then take it a step further to see how to use the slope...

Lesson Planet

#### Fun with Solids

Geometry is all around us—if we're only willing to look. The final three activities of the Fun with Solids unit continue work on surface area and volume. For lesson three, scholars investigate the formulas for spheres and solve a problem...

Lesson Planet

#### A Gardener’s Dilemma

Young horticulturists work together to design a garden plot using their knowledge of measurement, geometric figures, area, and perimeter formulas. Pupils' show what they know via a presentation, evaluation, survey, and quiz.

EngageNY

#### Properties of Area

What properties does area possess? Solidify the area properties that pupils learned in previous years. Groups investigate the five properties using four problems, which then provide the basis for a class discussion.

Lesson Planet

#### Volume of Cuboids and Cubes

Turn up the volume. After identifying the three dimensions of a prism, the presenter gives the formula for finding its volume. Using the formula, the video shows pupils how to find the volume of a rectangular prism and a cube. Classmates...

Lesson Planet

#### How Much Ice Cream?

A big ice cream cone is the perfect representation of a a mathematical sphere and cone. The activity asks learners to determine whether the scoop of ice cream can fit inside the cone if packed in. If not, construct a new cone that will...

Lesson Planet

#### Linear Relationships

There's just something special about lines in algebra. Introduce your classes to linear equations by analyzing the linear relationship. Young mathematicians use input/output pairs to determine the slope and the slope-intercept formula to...

Lesson Planet

#### Recursion: Smaller Sibling Pyramids

Get siblings to do your work. Scholars learn how to perform summations of arithmetic sequences in an innovative lesson plan. They use iterations, smaller siblings (tail-end recursion), and the divide-and-conquer approach.

Lesson Planet

#### Best Triangle

What makes an equilateral triangle equilateral? It turns out it's much more than just the side lengths! Learners analyze four different triangles to determine the best equilateral triangle. They create a formula that they later use to...