Review 3

Front

What is the formula for the area of a circle?

Back

The area of a circle is calculated using the formula: A = πr², where A is the area and r is the radius.

Front

What is the approximate value of π?

Back

The approximate value of π is 3.14.

Front

How do you solve the inequality 22 < 6c + 4?

Back

To solve the inequality, subtract 4 from both sides: 18 < 6c, then divide by 6: 3 < c, or c > 3.

Front

What is the shape of the cross-section when a cylinder is sliced perpendicular to its base?

Back

The shape of the cross-section is a rectangle.

Front

What is the difference between an equation and an expression?

Back

An equation has an equal sign and an expression does not.

Front

What is the solution to the inequality 7m - 8 > 6?

Back

To solve, add 8 to both sides: 7m > 14, then divide by 7: m > 2.

Front

What is the formula for the volume of a cylinder?

Back

The volume of a cylinder is calculated using the formula: V = πr²h, where r is the radius and h is the height.

Front

What does it mean for two shapes to be congruent?

Back

Two shapes are congruent if they have the same size and shape.

Front

What is the definition of a variable in mathematics?

Back

A variable is a symbol used to represent an unknown value in mathematical expressions or equations.

Front

What is the difference between a rational number and an irrational number?

Back

A rational number can be expressed as a fraction of two integers, while an irrational number cannot be expressed as a simple fraction.