Unit 1 Rational & Irrational Numbers Review

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Front

What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a simple fraction; it cannot be written as a ratio of two integers.

Front

Is 3.75 a rational or irrational number?

Back

Rational

Front

What is the formula for the circumference of a circle?

Back

The circumference C of a circle is given by the formula C = 2πr, where r is the radius.

Front

Calculate the circumference of a circle with a radius of 7 cm using π = 3.14.

Back

43.96 cm

Front

What is the approximate value of √50?

Back

Between 6 and 7.

Front

How do you convert a fraction to a decimal?

Back

Divide the numerator by the denominator.

Front

Convert 7/9 into a decimal.

Back

0.777... (repeating decimal)

Front

What is the formula for the area of a circle?

Back

The area A of a circle is given by the formula A = πr², where r is the radius.

Front

Calculate the area of a circle with a radius of 4 cm using π = 3.14.

Back

50.24 cm²