An explanation of how we can use A=1/2 bh and trigonometric ratios to find the area of a triangle when we don't have a value for h, the height. How to use a sine function with two side lengths and an included angle to find the area of a triangle. How to find the area of a triangle when we only know the lengths of the sides by using Heron's formula. Geometry 10.3a, Composite Figures & Area https://youtu.be/VbS-RkzIqbw Geometry 8.2a, Trigonometric Ratios, introducing Sine, Cosine, Tangent https://youtu.be/z_r8PGb-NqM Geometry 8.2b, Finding & Calculating Trig Ratios, Soh-Cah-Toa https://youtu.be/R8NshjG6guo Geometry 8.2c, Calculating Trig Ratios with a Trig Table https://youtu.be/NobppRSsNus High School Geometry Playlist https://www.youtube.com/playlist?list=PLKi4WTp6PRGVBM1nPhwW1lTuxi32Q0IZ3 FOLLOW ME: TWITTER https://twitter.com/JoannsSchool FACEBOOK Message me! https://www.facebook.com/JoAnnsSchool/ MINDS Minds.com/joannsschool SUPPORT MY WORK: PATREON https://www.patreon.com/JoannsSchool PAYPAL https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=KKAMABTBVDFNY YOUTUBE https://www.youtube.com/c/joannsschool ... https://www.youtube.com/watch?v=N8gwjgfO2fE

We can put fractions in order from least to greatest, or greatest to least by comparing them to benchmarks, using a common denominator, or comparing their denominators when they have common numerators. Using 1/2 as a benchmark, we can quickly decide if a given fraction is less than or greater than 1/2 to compare it to another fraction. Using common denominators, we can compare and order fractions by the amount of their numerator. The lowest numerator equals the lowest fraction and the greatest numerator equals the greatest fraction. When fractions have a common numerator, we can compare and order them by their denominators. The lowest denominator equals the greatest fraction because a small denominator represent larger equal parts. We locate and label fractions on a number line to help us put them in order by their size. The fraction that is the greatest distance from zero is the greatest fraction. We compare fractions by sorting them into lists of less than 1/2 or greater than 1/2 then marking them on the number line. We order fractions by giving them a common denominator and making a list of multiples where they can meet. We also find and write a numerator that makes an inequality true. 4th Grade Math 6.3, Fractions in Simplest Form, a.k.a. Reducing https://youtu.be/pccNZ9CKm4g 4th Grade Math 6.4, Common Denominators https://youtu.be/_jdRoXdv3bE 4th Grade Math 6.5, Word Problem Solving, Find Equivalent Fractions https://youtu.be/t4svIqhe41c 4th Grade Math 6.6, Compare Fractions Using Benchmarks https://youtu.be/c-ibOVdRQyg 4th Grade Math 6.7, Compare Fractions by Numerator, Denominator, or Benchmarks https://youtu.be/iC1kbqsKfaM 4th Grade Math Playlist https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn I'm using the Houghton Mifflin Go Math! 2015 copyright textbook for this playlist. You can practice online using the textbook's website https://www.gomathacademy.com/ FOLLOW ME: TWITTER https://twitter.com/JoannsSchool FACEBOOK https://www.facebook.com/JoAnnsSchool/ MINDS https://www.Minds.com/joannsschool SUPPORT MY WORK: PATREON https://www.patreon.com/JoannsSchool PAYPAL https://www.paypal.me/JoAnnsSchool YOUTUBE FAN FUNDING on my channel Home page https://www.youtube.com/channel/UCAZKtYcE5Jgd6hVL-RHv6Vw ... https://www.youtube.com/watch?v=PsUrhH8Xljg

An explanation of how we can estimate the area of an irregular shape by using two different methods. Method 1: We find the perimeter and area of a figure in a coordinate plane by using the Slope formula and Distance formula. Method 2: We find the area of a figure in the coordinate plane by enclosing it in a rectangle and using subtraction. We discuss the "Missing Square Puzzle", which has two figures that appear to have the same area but one has an extra square. Geometry 10.1a, Literal Equations https://youtu.be/Wm-YqGRepE0 Geometry 10.1b, Area Addition Postulate & Area of a Parallelogram https://youtu.be/omLMN5ijaYM Geometry 10.1c, Area of Triangles & Trapezoids https://youtu.be/M7KOvEOd-mg Geometry 10.1d, Area of Rhombuses & Kites https://youtu.be/OcKkIRX-9RQ Geometry 10.2a, Develop Pi or Construct to estimate Pi https://youtu.be/zb6eATudP9I Geometry 10.2b, Circumference & Area of a Circle https://youtu.be/1X2Xfxk3-Qc Geometry 10.2c, Area of Regular Polygons with the Apothem https://youtu.be/_yetNuzt8SY Geometry 10.3a, Composite Figures & Area https://youtu.be/VbS-RkzIqbw Geometry 10.3b, Triangle Area Formulas unknown height, Heron's Formula https://youtu.be/N8gwjgfO2fE High School Geometry Playlist https://www.youtube.com/playlist?list=PLKi4WTp6PRGVBM1nPhwW1lTuxi32Q0IZ3 FOLLOW ME: TWITTER https://twitter.com/JoannsSchool FACEBOOK Message me! https://www.facebook.com/JoAnnsSchool/ MINDS Minds.com/joannsschool SUPPORT MY WORK: PATREON https://www.patreon.com/JoannsSchool PAYPAL https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=KKAMABTBVDFNY YOUTUBE https://www.youtube.com/c/joannsschool Missing square puzzle https://en.wikipedia.org/wiki/Missing_square_puzzle Geometry 10.3a, Composite Figures & Area https://youtu.be/VbS-RkzIqbw Geometry 10.3b, Triangle Area Formulas unknown height, Heron's Formula https://youtu.be/N8gwjgfO2fE High School Geometry Playlist https://www.youtube.com/playlist?list=PLKi4WTp6PRGVBM1nPhwW1lTuxi32Q0IZ3 FOLLOW ME: TWITTER https://twitter.com/JoannsSchool FACEBOOK Message me! https://www.facebook.com/JoAnnsSchool/ MINDS Minds.com/joannsschool SUPPORT MY WORK: PATREON https://www.patreon.com/JoannsSchool PAYPAL https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=KKAMABTBVDFNY YOUTUBE https://www.youtube.com/c/joannsschool ... https://www.youtube.com/watch?v=PgOQED-7UlY

When the rate of change of a relationship is constant, every segment of its graph has the same steepness. The constant rate of change is called the slope of the line. In mathematics, the slope of a line is represented by the letter m. We review the quadrants of a coordinate plane. We learn the slope formula, the slope of a line as the ratio in the change in y-values for a segment of the graph to the corresponding change in x-values. It's the ratio of y to x as the rise over run. We explain the little numbers on the lower right of our x and y-values as subscripts that identify which y-values and x-values we are using. On the coordinate plane, we show a line as a positive slope, negative slope, zero slope, or undefined slope. We walk-through several graphs as we find the slope of the line m, using the slope formula. 8th Grade Math 3.2a, Investigating Rates of Change https://youtu.be/fEnLJCY-0Do 8th Grade Math 3.2b, Using Graphs to Find Rates of Change https://youtu.be/B4ekP00y92M 8th Grade Math Course Playlist https://www.youtube.com/playlist?list=PLKi4WTp6PRGXnc3q2i4u3GMqVHYBFMz56 This video and its contents are the property of JoAnn's School and is protected under U.S. copyright law. To avoid a copyright strike, do not re-upload them or any part of them, to your own channel. Do not reproduce, distribute, transmit, broadcast, display, sell, license, or otherwise exploit any content for any other purposes. FOLLOW ME: YouTube https://www.youtube.com/joannsschool Facebook https://www.facebook.com/JoAnnsSchool/ MINDS https://www.Minds.com/joannsschool Odysee https://www.odysee.com/JoAnnsSchool:2 Twitter https://twitter.com/JoannsSchool SUPPORT MY WORK: PATREON (monthly) https://www.patreon.com/JoannsSchool PAYPAL (one time) https://www.paypal.me/JoAnnsSchool TEESPRING (buy stuff) https://teespring.com/stores/joanns-school Textbook: Go Math! Student Interactive Worktext Grade 8 2018 Student Edition Publisher : HOUGHTON MIFFLIN HARCOURT; Student edition (April 28, 2017) Language: ‎English 2018 copyright ISBN-13 : 978-1328761071 Item Weight : 2.85 pounds Paperback : 608 pages Product dimensions : 8.4 x 1.1 x 10.7 inches ... https://www.youtube.com/watch?v=KW3rYqNNxYg