4th Grade Review

Front

What is the formula to calculate the area of a rectangle?

Back

Area = Length × Width

Front

If the area of a rectangle is 28 square inches and the width is 4 inches, what is the length?

Back

Length = Area ÷ Width = 28 ÷ 4 = 7 inches

Front

What is the formula to calculate the perimeter of a rectangle?

Back

Perimeter = 2 × (Length + Width)

Front

If the length of a rectangle is 7 inches and the width is 4 inches, what is the perimeter?

Back

Perimeter = 2 × (7 + 4) = 2 × 11 = 22 inches

Front

What is an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.

Front

What is the measurement of a right angle?

Back

90 degrees

Front

What is the measurement of an obtuse angle?

Back

An obtuse angle is greater than 90 degrees but less than 180 degrees.

Front

What is the measurement of an acute angle?

Back

An acute angle is less than 90 degrees.

Front

How many degrees are in a straight angle?

Back

180 degrees

Front

What is the sum of angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees.