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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

5. Isosceles and Equilateral Triangles

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Exercise 12 Page 378

Consider the Converse of the Isosceles Triangle Theorem.

AD≅ DE

Practice makes perfect

Before we begin, let's use the given information to mark the congruent angles ∠ DAE ≅ ∠ DEA.

To name two congruent segments, we will use the Converse of the Isosceles Triangle Theorem.

Converse of the Isosceles Triangle Theorem
If two angles of a triangle are congruent, then the sides opposite those angles are congruent.

Using this theorem, let's show the congruent sides.

We can see that AD is congruent to DE. AD≅ DE

Subchapter links

Exercises p.378-382