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Master Scale Diagrams: Learn How to Create & Interpret

Grade 12 Math: Master Advanced Concepts & Skills

Geometric constructions

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Classifying triangles

Isosceles and equilateral triangles

Conics - Parabola

Conics - Circle

Conics - Ellipse

Conics - Hyperbola

Parallel and perpendicular lines

Pairs of lines and angles

Parallel lines and transversals

Parallel line proofs

Perpendicular line proofs

Circle geometry

Angles in a circle

Circles and circumference

Circle properties

Arcs of a circle

Areas and sectors of circles

Transformations of 2D shapes

Line symmetry

Rotational symmetry and transformations

Enlargements and reductions with scale factors

Scale diagrams

Similar triangles

Similar polygons

Non-Euclidean geometries

Combining transformations of functions

Surface area of 3-dimensional shapes

Transformations of functions: Horizontal translations

Transformations of functions: Vertical translations

Reflection across the y-axis: y = f(-x)

Reflection across the x-axis: y = -f(x)

We&apos;ve got you covered with our complete help for Grade 12 math, whether it&apos;s Ontario curriculum, <a href="https://www.alberta.ca/writing-diploma-exams.aspx">Diploma exam</a> (Alberta), <a href="http://www.edu.gov.mb.ca/k12/assess/tests/index.html">Provincial test</a> (Manitoba) or <a href="https://www.saskatchewan.ca/residents/education-and-learning/departmental-exams">Departmental exam</a> (Saskatchewan).

Aligned with your class or textbook, you will get grade 12 math help on topics like Trigonometric identities, Vectors, Permutations and Combinations, Matrices, Polynomial functions and so many more. Learn the concepts with our video tutorials that show you step-by-step solutions to even the hardest grade 12 math questions. Then, strengthen your understanding with tons of grade 12 math practice. 

All our lessons are taught by experienced Grade 12 math teachers. Let&apos;s finish your homework in no time, and ACE that final.

Geometry 12

math

https://dmn92m25mtw4z.cloudfront.net/img/textbook/textbook-grade12math.png

Intro

- Hi and welcome to this question right here. We're trying to figure out the actual length of the objects now, okay? 
And there's a scale of the image of the leaf is 1.02 and here is the length of the image at 50 centimeters. Now there is something that we have to know, okay? The equation says the ratio is based on the image divided by actual part of the object. What happened is the image on top the actual object on bottom. Let's continue on with our work right here. We know the ratio is 1 and .2. The 1 is the image and the 
.2 is the actual. I'm going to continue my work right here. This is my 1. This is my 0.2 And I'm going to make it equal to another fraction here because I do know the length of my image. It's 50 centimeters. So again, the image goes on the top. Here's my 50 centimeter and the missing number is this part right here which is the actual, the length of the object, okay? It looks like you do know everything except this part right here. So the math here is quite simple. But think about this way. They're equal to each other. How do I go from 1 to 50? I multiply by 50, didn't I? You have to do the same to the bottom. You also have to times by 50 to the bottom part. So 50 times .2, if you use the calculator, you're going to get an answer of, just going to be, a ten for the final answer. The actual length of this leaf here is just going to be 10 centimeters, okay? 
Thanks for watching.

What is the actual length of a street on the map? All we need is a ruler and the map's scale factor! By using the scale factors, we can easily find the actual size of an object. See how to do that in this lesson.

Understanding scale drawings with examples

Ratios