ACT 2024 Math Flashcards

Discriminant

Discriminant

The portion of the quadratic formula under the radical sign, b²-4ac

Distinct

different

Greatest Common Factor

The largest factor common to two numbers

Least Common Multiple

The smallest multiple common to two numbers

Rational

A number that can be expressed as the ratio of two other numbers, making a fraction

Supplementary Angles

Angles that add up to 180.

Vertical Angles

Angles that are opposite from each other and always equal each other

Perpendicular Angle

A measure of 90 degrees

Equilateral Triangle

Three equal sides and angles

Hypotenuse

Longest side of the triangle, opposite of the right angle

Pythagorean Theorem

a²+b²=c²

Isosceles Right Triangle

Whatever the length of those two equal sides of the isosceles triangle, the length of the hypotenuse is always equal to those side lengths times the square root of 2.

Formula for the Area of a Circle

pi*r²

Formula for the Circumference of a Circle

2*pi*r