## Grade 9 practice investigation

Notice, Wonder….

Dans les groupes nous allons poser les bonnes questions de mathématiques, et nous allons demander pour de l’information necessaire pour les resoudre.

Nous allons poser les questions de chaque section de notre curriculum: la numération et algèbre, la géométrie, les relations, et la géométrie analytique.

Pour notre investigation, le deuxième jour, vous allez recevoir de l’information que vous voulez, et vous allez individuellement resoudre les problèmes que vous avez crées.

## How tall’s the school?

We are using mirrors to determine the height of the school. Using the law of reflection we can create 2 similar triangles. One between the heigt of the school, and the length of the ground between the school and the mirror.

And one involving the height to the observer’s eyes, and the distance from the observer’s feet to the mirror.

We can determine the proportionality constant and calculate the height of the school!

## Using shadows to determine heights

## Grade 10 homework

## Motor building

## Reviewing for our test

Tomorrow is a test day for grade 9s. Today we spent time working in groups to review material and get ready.

We did some “speed dating” style review for graphing lines and calculating slopes.

We worked on solving some word problems using multiple strategies.

And represented growing patterns using tables and graphs and equations.

We also had 3 teachers from Molly Brant Elemetary school with us, and a school board consultant, the math department head and student success teacher in the room. We shared with everyone how we are using our strategies to solve problems. Good job today!

## desmos with angry birds

click on each image to open a desmos graph. You will notice that the slingshot is located on the x axis at -6, so all your graphs must go through that point. You need to create an equation for a parabola that will get the bird successfully to each of the pigs.

Here’s another to try: This time try to determine the equation of the bird in flight, and decide if it will hit any of the monkeys. Create parabolas that will land the bird at each of the monkeys.