Measuring Proportion

Complete each proportion.
CB / DM  =  AC / ?

• BM

• MA

• BC

• AD

Triangle ABC is similar to triangle FGH.
What is the value of x in centimeters?

• 22.5 cm

• 8 cm

• 10.8 cm

• 30 cm

Find missing side

• 5

• 7

• 9

• 11

Find y.

• 144

• 18

• 72

• 12

when two quantities always have the same size in relation to each other

• Intersecting Lines

• Origin

• Proportional Relationships

• Slope

How do you know whether two quantities x and y are proportional?

• Every sum x + y is the same for related pairs of x and y.

• Every x term is a multiple of the previous term.

• Every difference x – y is the same for related pairs of x and y.

Answer explanation

Proportional relationships are equivalent ratios.

Tags

CCSS.MATH.CONTENT.7.RP.A.2.a

You can buy 4 tickets for $75 or 5 tickets for $94. Are the costs proportional?

• yes

• no

Two quantities are proportional if :

• numerator x numerator = denominator x denominator

• unit rates are the same

• one quantity is bigger than the other

The relationship between two quantities where one quantity is a constant multiple of the other quantity.

• Proportional relationship

• Linear relationship

• Inversely proportional

• Direct relationship

Determine if the following pairs of quantities are proportional: (2, 3), (4, 6), (6, 9).

• Yes

• No