Geometry Flashcard Review

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object or figure that is proportional to the actual size, using a specific ratio or scale.

Front

What does it mean for two figures to be congruent?

Back

Two figures are congruent if they have the same size and shape.

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if they have the same shape but different sizes, with corresponding angles being equal and corresponding sides being proportional.

Front

How do you find the scale factor between two similar figures?

Back

The scale factor is found by dividing the length of a side of one figure by the length of the corresponding side of the other figure.

Front

If the scale factor from ΔDEF to ΔABC is 2, what does this mean?

Back

It means that each side of ΔABC is twice the length of the corresponding side of ΔDEF.

Front

What is the scale factor from a small fry to a large fry if the large fry is 3 times bigger?

Back

The scale factor is 3.

Front

If a rectangle's length is 20 cm and its width is 10 cm, what is the area?

Back

The area is 200 cm² (Area = length × width).

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is the difference between congruent and similar figures?

Back

Congruent figures are identical in size and shape, while similar figures have the same shape but may differ in size.

Front

If two rectangles are similar and one has a length of 10 cm and a width of 5 cm, what is the length of the other rectangle if the scale factor is 2?

Back

The length of the other rectangle is 20 cm (10 cm × 2).