7th Grade Math STAAR Review

Front

What is the sum of the interior angles of a pentagon?

Back

The sum of the interior angles of a pentagon is 540 degrees.

Front

If angle R in a pentagon measures 100 degrees and angles Q and S are congruent, how do you find the measure of angle Q?

Back

Subtract the measure of angle R from 540 degrees, then divide the remainder by 3 (since Q and S are congruent).

Front

How do you calculate the amount each student must raise if a group has already raised some money?

Back

Subtract the amount already raised from the total goal, then divide by the number of students.

Front

What is the formula for calculating simple interest?

Back

Simple Interest = Principal × Rate × Time.

Front

If a bank account earns 4% interest on a $300 deposit, how much interest is earned in one year?

Back

$12.

Front

What is a reasonable prediction based on a sample?

Back

Use the ratio of the sample to predict outcomes in a larger population.

Front

What is the equation of a line in slope-intercept form?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you determine the slope of a line from a table of values?

Back

Calculate the change in y divided by the change in x between two points.

Front

What does it mean for angles to be congruent?

Back

Congruent angles have the same measure.

Front

How do you find the measure of an unknown angle in a polygon?

Back

Use the formula for the sum of the interior angles and solve for the unknown angle.