8th Bell Ringer 12/3/24

Front

What type of number is π?

Back

Irrational numbers are numbers that cannot be expressed as a fraction of two integers. π is an example of an irrational number.

Front

What is the sum of the angle measures in any triangle?

Back

The sum of the angle measures in any triangle is always 180°.

Front

What happens to the area of a triangle when it is rotated?

Back

The area of a triangle remains the same when it is rotated.

Front

What is the rule for translating a point 4 units left and 5 units up?

Back

The transformation rule is (x, y) → (x - 4, y + 5).

Front

How do you find the distance between two points A(x1, y1) and B(x2, y2)?

Back

Use the distance formula: Distance = √((x2 - x1)² + (y2 - y1)²).

Front

What is a transformation that does NOT preserve congruence?

Back

A dilation by a scale factor other than 1 does not preserve congruence.

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction a/b, where a and b are integers and b ≠ 0.

Front

What is the definition of congruence in geometry?

Back

Two figures are congruent if they have the same shape and size, meaning they can be made to coincide by rigid transformations.

Front

What is the effect of a rotation on the coordinates of a point?

Back

A rotation changes the position of a point around a center point but does not change its distance from that center.

Front

What is the formula for the area of a triangle?

Back

The area of a triangle is given by the formula: Area = 1/2 * base * height.