Q2W8 Geo Ratios, Proportions, Scale Factor Flashcard

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

Define proportion.

Back

A proportion is an equation that states that two ratios are equal.

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. It is used to determine the size of an object in relation to another object.

Front

How do you find the perimeter of a triangle?

Back

To find the perimeter of a triangle, add the lengths of all three sides together.

Front

What does it mean for two triangles to be similar?

Back

Two triangles are similar if their corresponding angles are equal and their corresponding sides are in proportion.

Front

If the scale factor is 1/2, what does that mean?

Back

A scale factor of 1/2 means that the dimensions of the new shape are half the size of the original shape.

Front

How do you solve for x in a proportion?

Back

To solve for x in a proportion, cross-multiply and then isolate x.

Front

What is the formula for finding the area of a triangle?

Back

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

Front

What is the relationship between similar triangles and their areas?

Back

The areas of similar triangles are proportional to the square of the ratio of their corresponding sides.

Front

How do you determine if two shapes are similar?

Back

To determine if two shapes are similar, check if their corresponding angles are equal and their corresponding sides are in proportion.