Choice Board for AS #1: Applications

Choice Board #1:

Applications

Find the value of x in the figure to the right

What information do we need to work out this problem?

The sum of the angles in a triangle is 180 degrees...

in other words the angles add up to 180

All angles add up to 180 so we start there!

(7x - 11) + (2x - 3) + (5x -2) = 180

Multiple Select

(7x - 11) + (2x - 3) + (5x -2) = 180

Which terms would be combined with 7x?

• -11

• 2x

• -3

• 5x

• -2

Multiple Select

(7x - 11) + (2x - 3) + (5x -2) = 180

Which terms would combine with -11?

• 7x

• 2x

• -3

• 5x

• -2

Add the x terms and then add the constants

Multiple Choice

What is your first step when solving 14x - 16 = 180?

• add 16

• subtract 16

• divide by 14

• multiply by 14

First you undo the addition with subtraction and then you undo the multiplication with division

Let's do one together

I will share my screen as I do the work out

Solve for x when the perimeter is 166 units

We need to first label all four sides

Next, add all the sides and set equal to 166