Circumference/Area of a Circle, Angles and Composite Figures

Front

What is the formula for the area of a circle?

Back

Front

What is the circumference of a circle?

Back

Front

What is the value of π (pi)?

Back

π (pi) is approximately equal to 3.14.

Front

What is the relationship between diameter and radius?

Back

The diameter d of a circle is twice the radius r: d = 2r.

Front

What is a composite figure?

Back

A composite figure is a shape that is made up of two or more simple shapes.

Front

How do you find the area of a composite figure?

Back

To find the area of a composite figure, calculate the area of each simple shape and then sum them up.

Front

What is an angle?

Back

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

Front

What are the types of angles?

Back

The types of angles include acute (less than 90°), right (exactly 90°), obtuse (greater than 90° but less than 180°), and straight (exactly 180°).

Front

What is the sum of angles in a triangle?

Back

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

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90°.