📐

Similar Triangles

★★☆☆☆Middle School

📖Definition

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

(a)/(a') = (b)/(b') = (c)/(c') = k

Scale factor (ratio of similarity)

(S₁)/(S₂) = k²

Ratio of areas = square of scale factor

예제 1★★☆☆☆

Triangles ABC and DEF are similar with ratio 2:3. If ABC has area 8cm², find DEF's area.

Indirect distance measurement

Scale calculations

#geometry#triangle#similarity