Math 7 Review

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve for an unknown in a proportion?

Back

Cross-multiply the two ratios and then solve for the unknown.

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object where the dimensions are proportional to the actual object.

Front

If a scale is 4 cm:9 ft, how do you find the actual size from the drawing?

Back

Use the scale to set up a proportion: (drawing length)/(actual length) = (4 cm)/(9 ft).

Front

What is the formula for probability?

Back

Probability = (Number of favorable outcomes) / (Total number of possible outcomes).

Front

What is the probability of rolling a multiple of 3 on a standard number cube?

Back

There are 2 multiples of 3 (3 and 6) on a cube, so the probability is 2/6 = 1/3.

Front

What is a number cube?

Back

A number cube is a six-sided die with faces numbered from 1 to 6.

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if they have the same shape but not necessarily the same size.

Front

How do you find the length of a side in similar figures?

Back

Set up a proportion using corresponding sides of the similar figures.

Front

What is the relationship between the scale factor and the dimensions of similar figures?

Back

The scale factor is the ratio of the lengths of corresponding sides of similar figures.