[Pic of triangle] Find the measure.

[Pic of triangle] Find the measure.

[Pic of triangle] Find the measure.

Answers (1)

The two tick marks on the sides of the triangle mean that those two sides are congruent. A triangle with two congruent sides is called an isosceles triangle.
The base angles of an isosceles triangle are congruent. The base angles are the angles opposite of the congruent sides. The base angles of the triangle are then x∘ and 13∘ so x=13.

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