STAAR Review-8th Grade Math

Front

What is the formula for the volume of a cone?

Back

Volume = (1/3)πr²h, where r is the radius and h is the height.

Front

What does it mean for a relationship to be a function?

Back

A relationship is a function if each input has exactly one output.

Front

What is the definition of direct proportionality?

Back

Two variables are directly proportional if they increase or decrease together, represented by the equation y = kx, where k is a constant.

Front

How do you find the length of a missing side in a right triangle?

Back

Use the Pythagorean theorem: a² + b² = c², where c is the hypotenuse.

Front

What is dilation in geometry?

Back

Dilation is a transformation that changes the size of a figure but not its shape, using a scale factor.

Front

What is the scale factor in dilation?

Back

The scale factor is the ratio of the length of a side of the image to the length of the corresponding side of the original figure.

Front

How do you calculate the area of a quadrilateral?

Back

The area can be calculated using various formulas depending on the type of quadrilateral (e.g., A = base × height for rectangles).

Front

What is the formula for the area of a triangle?

Back

Area = (1/2) × base × height.

Front

What is the difference between a rational and an irrational number?

Back

A rational number can be expressed as a fraction of two integers, while an irrational number cannot be expressed as a simple fraction.

Front

What is the definition of a linear equation?

Back

A linear equation is an equation that makes a straight line when graphed, typically in the form y = mx + b.