####
Now... gain access to over
**2 Million**
curated educational videos and
**500,000**
educator reviews to free & open educational resources

### We found 126 reviewed resources

EngageNY

#### The Area of Right Triangles

Slice and dice area. Pupils cut rectangles in half and determine the area of the resulting right triangles. They use what they discovered to develop a formula to find the area of a right triangle in the second lesson plan in a 22-part...

EngageNY

#### End-of-Module Assessment Task: Grade 6 Math Module 5

Assess the class' ability to solve problems involving area, surface area, and volume with a six-question assessment that presents problems covering aspects of calculating measurements of 2-D and 3-D figures. Class members use the...

EngageNY

#### The Area of All Polygons Through Composition and Decomposition

To compose or decompose, that is the question. The fifth portion of a 22-part series presents area problems of polygons. Pupils determine how to compose or decompose the polygons into shapes whose area is easily calculated.

EngageNY

#### The Area of Acute Triangles Using Height and Base

Use the height of an acute triangle to create two right triangles. The third lesson in a series of 22 has pupils divide acute triangles into two right triangles. Scholars calculate the areas of the two right triangles and add them...

EngageNY

#### The Area of All Triangles Using Height and Base

Drop in the altitude is all that is needed. Pupils explore finding areas of different types of triangles. Learners realize the formula for finding their area is the same and explore the location of altitudes in triangles to finish the...

EngageNY

#### The Area of Parallelograms Through Rectangle Facts

Slide a portion of a parallelogram to make a rectangle. Pupils cut parallelograms and create rectangles from the pieces. They make the connections to the areas of the figures and realize that the formula for area is the same for both...

Lesson Planet

#### Between the Lines

Explore linear and square dimensions by comparing areas of similar figures. A creative set of five activities designed for elementary through high school classes asks young scholars to compare areas of specific polygons. The first two...

Lesson Planet

#### Part and Whole

Now you'll never have trouble cutting a cake evenly again. Here is a set of five problems all about partitioning shapes into a given number of pieces and identifying the fractional amount of each piece. As learners progress through the...

Lesson Planet

#### Double Down

Double the dog ears, double the fun. Five problems provide increasing challenges with non-linear growth. Topics include dog ears, family trees and population data, and geometric patterns.

Lesson Planet

#### Poly-Gone

Investigate polygons from rectangles to triangles to octagons. Each level of the five-problem series targets a different grade level. Beginning with the level A problem, learners examine the relationship between area and perimeter by...

Lesson Planet

#### Tri-Triangles

Develop an understanding of algebraic sequences through an exploration of patterns. Five leveled problems target grade levels from elementary through high school. Each problem asks young mathematicians to recognize a geometric pattern....

Lesson Planet

#### Surrounded and Covered

What effect does changing the perimeter have on the area of a figure? The five problems in the resource explore this question at various grade levels. Elementary problems focus on the perimeter of rectangles and irregular figures with...

Lesson Planet

#### Area and Perimeter

Develop a strategy for finding the area and perimeter of irregular figures. Building on an understanding of finding area and perimeter of rectangles and triangles, learners apply the same concepts to composite figures. After practicing...

Lesson Planet

#### Area of Compound Shapes

Scholars learn how to determine the area of compound shapes by finding the areas of the basic shapes that make it up. Pupils find the areas by adding areas together or subtracting them.

Lesson Planet

#### Build Your Dream Science Lab

Would your ideal science lab be filled with bubbling beakers and zapping Tesla coils? Or would it contain state-of-the-art computer technology and data analysis? Dream big with an innovative lesson that connects math and language arts...

Lesson Planet

#### Area of Rectangles Using Sums and Differences

Use the formula for the area of a rectangle for more than just rectangles! Scholars see that they can use common area formulas to find the area of irregular shapes.

Lesson Planet

#### Area of Rectangles

A critical skill in mathematics is using formulas to solve problems. Learners see the area formula for rectangles applied to three different types of problems. The video instructor demonstrates problems represented with a diagram,...

Lesson Planet

#### Representing the Laws of Arithmetic

Sixth graders connect numerical expressions to geometric area. They first complete an assessment task requiring them to identify area models for numerical expressions. Learners then participate in an activity to match area models to...

Lesson Planet

#### Optimizing Coverage: Security Cameras

Are you being watched? Class members determine where to place security cameras protecting a shop. They then evaluate their own and several provided solutions.

Lesson Planet

#### Smoothie Box

Pupils demonstrate their understanding of nets by designing a net of a box that contains 12 bottles. Given the full size top and side views of the bottle, they determine the dimensions needed for the finished box. The directions do not...

Lesson Planet

#### Security Camera

Only you can prevent shoplifting. Class members use a given floor plan to investigate the placement of a security camera. They must incorporate knowledge of area and percents to complete the task.

Lesson Planet

#### Fruit Boxes

Perfect for visual and hands-on learners, an engaging lesson prompts pupils to consider the different-sized boxes they can create from a piece of cardboard. They develop a model to determine the size of the box with the greatest volume.

Lesson Planet

#### Study Jams! Area of a Parallelogram

Get introduced to the idea of square units and how to calculate the area of a parallelogram. The resource provides a visual lesson to measuring different types of this shape and how it relates to square units.

Lesson Planet

#### Formulas for Elementary and Intermediate Algebra

Give your scholars the support they need to work with formulas. A reference page offers definitions and picture examples of perimeter, area, surface area, volume, the Pythagorean theorem, a variety of shapes, and more.