ACT Math Prep #1

Front

What is the sum of the measures of the angles in a triangle?

Back

The sum of the measures of the angles in a triangle is 180°.

Front

If one angle in a triangle is 40°, what is the maximum possible measure of another angle?

Back

The maximum possible measure of another angle is 140°.

Front

How do you calculate the area of a rectangle?

Back

Area = length × width.

Front

If a wall is 13 feet by 11 feet and has a door of 7 feet by 3 feet, how do you find the area of the wall that needs wallpaper?

Back

Calculate the area of the wall, subtract the area of the door: (13 × 11) - (7 × 3) = 143 - 21 = 122 square feet.

Front

What is the formula for the slope of a line given in the form Ax + By = C?

Back

Slope (m) = -A/B.

Front

What is the slope of the line given by the equation 3x + y = 4?

Back

The slope is -3.

Front

How do you calculate the perimeter of a polygon?

Back

Perimeter = sum of the lengths of all sides.

Front

What is the perimeter of a pentagon with each side measuring 17 millimeters?

Back

Perimeter = 5 × 17 = 85 millimeters.

Front

What is the average score formula?

Back

Average = (sum of scores) / (number of scores).

Front

If Carmen needs an average score of 92 over 5 tests, what is the total score she needs?

Back

Total score needed = 92 × 5 = 460.