4th grade Keywords Math

Front

What is an obtuse triangle?

Back

A triangle that has one obtuse angle (greater than 90 degrees) and two acute angles (less than 90 degrees).

Front

What operation do you use when you see 'each' in a math problem?

Back

Multiply.

Front

How do you find the perimeter of a shape?

Back

Add ALL sides together.

Front

What does 'each' represent in a story problem?

Back

Multiplication.

Front

What does it mean for lines to be perpendicular?

Back

Lines that cross at 90 degrees angles.

Front

What is an acute triangle?

Back

A triangle where all three angles are acute (less than 90 degrees).

Front

What is a right triangle?

Back

A triangle that has one right angle (exactly 90 degrees).

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is a polygon?

Back

A closed figure with three or more straight sides.

Front

What is a quadrilateral?

Back

A polygon with four sides.