Ratios Review and Triangle Lesson

Ratios Review and Triangle Lesson

Scale is 5in= 40 ft.
The model is

 $5\ \frac{3}{4}\ \times\ 7\ \frac{1}{4}$ .

What is the actual area?  

Scale is 8in= 96ft
The model is

 $6\ \frac{1}{2}\ \times\ 8\ \frac{1}{4}$  
What is the actual area? 

When given the sides, does it make a triangle?

• side 1= 10

• side 2= 15

• side 3 = 20

• Rule: when adding the two shortest sides it has to be bigger than the longest side.

• So... 10+15 >20

• So, yes this makes a triangle.

Are these triangles?

side 1=12 , side 2= 13, side 3=25

side 1=6 , side 2= 8, side 3=15

side 1=3 , side 2= 4, side 3=5

Multiple Choice

Side 1 = 6

Side 2 = 8

Side 3= 10

Is this a triangle?

• yes

• no

Multiple Choice

Side 1 = 7

Side 2 = 21

Side 3= 35

Is this a triangle?

• yes

• no

Multiple Choice

Side 1 = 5

Side 2 = 7

Side 3= 11

Is this a triangle?

• yes

• no

Multiple Choice

Side 1 = 10

Side 2 = 12

Side 3= 22

Is this a triangle?

• yes

• no

You have a triangle where Angle 1= 2x +10

Angle 2= 3x

Angle 3= 70.

What is x and what are Angles 1 and 2?

You have a triangle where Angle 1= 6x+10

Angle 2= 4x

Angle 3= 70.

What is x and what are Angles 1 and 2?

You have a triangle where Angle 1= 3x-10

Angle 2= 5x

Angle 3= 30.

What is x and what are Angles 1 and 2?