Finding Missing Sides with Proportions

Determine the scale factor of the similar figures:

​ (a)  

• 2:5
• 6:15
• 10:25
• 8:20
• 5:2
• 15:6
• 25:10
• 20:8

Tags

CCSS.7.G.A.1

CCSS.7.RP.A.2

Determine the scale factor of the similar figures:

​ (a)  

• 1:2
• 2:4
• 3:6
• 2:1
• 4:2
• 6:3
• 2:3
• 4:6

Tags

CCSS.7.G.A.1

CCSS.7.RP.A.2

Determine the scale factor of the similar figures:

​ (a)  

• 4:3
• 3:4
• 20:15
• 15:20

Tags

CCSS.7.G.A.1

CCSS.7.RP.A.2

Side TA and side​ ​ (a)   are corresponding (matching).

• MO
• AR
• TR
• OP
• MP
• TA

Tags

CCSS.HSG.SRT.A.2

CCSS.HSG.SRT.A.3

CCSS.HSG.SRT.B.5

Use a proportion to find the value of the variable.

m=___

Mathematical Equivalence

ON

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

Match the following similar figures to the correct missing side lengths.

(hint: use proportions to find the value of each variable)

• x=8

• 
• x=25

• 
• y=20

• 
• x=0.66666

• 
• x=4

• 

Tags

CCSS.7.RP.A.2

The following figures are similar. Use proportions to find the value of x.

ONLY FIND x!!

Mathematical Equivalence

ON

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

The following figures are similar. Use proportions to find the value of y.

ONLY FIND y!!

Mathematical Equivalence

ON

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

Chantel wanted to know the height of the ferris wheel at the fair. She measured the shadow of the ferris wheel to be 48 feet. Chantel is 5 feet tall. She measured her shadow to be 8 feet.

Find the height (x) of the ferris wheel (hint: use a proportion).

Mathematical Equivalence

ON

Tags

CCSS.7.RP.A.2

Draw a diagram of the following situation:

Leon wanted to know the height of his school building. Leon is 6 feet tall. His shadow is 8 feet long. The shadow of the building is 80 feet long.

Tags

CCSS.HSG.SRT.B.5