Congruence and Similarity

Introduction to congruence

Transformations and congruence

Congruence in triangles

Congruence in quadrilaterals

Simple proofs for congruence in triangles

Introduction to similarity

Transformations and similarity

Similarity in triangles

Using similarity proportion to solve problems

Trigonometry and similarity

Applying Similar Triangles (Investigation)

Applications of similarity and symmetry

Grade 10

Using similarity proportion to solve problems

Interactive practice questions

Find the value of $u$u using a proportion statement.

Two similar triangles. The smaller triangle, positioned on the left, has its vertices labeled A, B, and C. The larger triangle, situated on the right, has its vertices labeled D, E, and F. Angle A of triangle(ABC) is congruent to angle D of triangle(DEF), as indicated by a single arc on each of these angles. Additionally, angle C of triangle(ABC) is congruent to angle F of triangle(DEF), with this congruence denoted by two arcs on these angles. In $\triangle ABC$△ABC, sides AB which is opposite to angle C measures $16$16 units. Side AC which is opposite to angle B measures $8$8 units. In $\triangle DEF$△DEF, side DE which is opposite angle F measures $u$u units, and side DF which is opposite angle E measures $18$18 units

Easy

1 min

Consider the attached figure.

Easy

< 1 min

The two given triangles are similar.

Easy

< 1 min

The two given triangles are similar.

Easy

< 1 min

Outcomes

10D.T1.03

Solve problems involving similar triangles in realistic situations

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