Similar Figures, Scale Drawings, Proportions

Front

What are similar figures?

Back

Figures that have the same shape but may differ in size. Their corresponding angles are congruent, and their corresponding sides are in proportion.

Front

What does it mean for angles in similar figures?

Back

All angles in similar figures are congruent.

Front

What is a scale drawing?

Back

A drawing that represents an object or a figure at a specific ratio to its actual size.

Front

What is a proportion?

Back

An equation that states that two ratios are equal.

Front

If two triangles are similar, what can be said about their sides?

Back

The lengths of their corresponding sides are in proportion.

Front

How do you find a missing length in similar figures?

Back

Set up a proportion using the lengths of corresponding sides and solve for the missing length.

Front

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

Back

Perimeter = sum of the lengths of all sides.

Front

If a triangle has sides of lengths 3, 4, and 5, what is the perimeter?

Back

The perimeter is 3 + 4 + 5 = 12.

Front

What is the relationship between scale factor and area in similar figures?

Back

If the scale factor is k, the area of the similar figure is k² times the area of the original figure.

Front

How do you calculate a percentage increase?

Back

Percentage Increase = (New Value - Original Value) / Original Value x 100%.