Similar Triangles

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What are similar triangles?

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

Front

What is the symbol for similarity in triangles?

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What is the Angle-Angle (AA) criterion for triangle similarity?

Back

If two angles of one triangle are equal to two angles of another triangle, then the triangles are similar.

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What is the Side-Angle-Side (SAS) criterion for triangle similarity?

Back

If one angle of a triangle is equal to one angle of another triangle and the sides including those angles are in proportion, then the triangles are similar.

Front

What is the Side-Side-Side (SSS) criterion for triangle similarity?

Back

If the corresponding sides of two triangles are in proportion, then the triangles are similar.

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Front

Back

It indicates that triangles ABC and DEF are similar by the Side-Side-Side (SSS) similarity criterion.

Front

What is the relationship between the areas of two similar triangles?

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The ratio of the areas of two similar triangles is equal to the square of the ratio of their corresponding sides.

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Back

Front

How do you find the missing angle in a triangle if two angles are known?

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