ACT Math Vocabulary Review

Front

The average of a group of numbers is also called the ________ of the numbers.

Back

mean

Front

If two lines intersect to form right angles, the lines are ________ to each other.

Back

perpendicular

Front

What is the longest side of a right triangle called?

Back

hypotenuse

Front

What is the formula for circumference of a circle given the diameter?

Back

C = πd

Front

What is the coefficient of the following algebraic expression? 7x^5 + 19

Back

7

Front

What is the formula for the area of a triangle?

Back

A = \frac{1}{2}bh, where b is the base and h is the height.

Front

What do you call a polygon with four sides?

Back

quadrilateral

Front

What is the Pythagorean theorem?

Back

a^2 + b^2 = c^2, where c is the hypotenuse.

Front

What is the formula for the slope of a line?

Back

m = \frac{y_2 - y_1}{x_2 - x_1}

Front

What is the term for the distance around a circle?

Back

circumference