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Geometry Section 05 Vocabulary

Name: ___________________________________
Period: ___________________________________
Date: ____________________________________
Across
The ____ Angle Theorem states that if two sides in a triangle are congruent, then the angles opposite to these sides are also congruent.
To find the _________ of a triangle on the coordinate plane, use the Distance Formula for each of the three sides. Then, add up your three answers.
_____ motions move figures to a new location without altering their size or shape, this maintaining the conditions for the figures to be congruent.
A(n) _________ triangle has two congruent sides.
The ________ of the Base Angle Theorem is also true. If two angles of a triangle are congruent, then the sides opposite to these angles are congruent.
The last statement of a two-column proof will always be what you are asked to _____.
If two angles and a ___-included side of one triangle are congruent to two angles and a ___-included side of a second triangle, then the two triangles are congruent.
A(n) ___________ triangle has all 60° angles.
We can ________ triangles by their angles and their sides.
A(n) _______ triangle has one obtuse angle.
The ___ of the interior angles in a triangle is 180°.
A(n) _____ triangle has three acute angles.
Down
The formula for the ____ of a triangle is ½bh.
Angle-Side-Angle (ASA) Congruence Postulate: If two angles and the included side of ___ triangle are congruent to two angles and the included side of a second triangle, then the two triangles are congruent.
The reason that shared sides of two triangles are congruent is because of the __________ Property of Congruence.
The first reason in any two-column proof is the _____ information.
By definition, two figures are _________ if and only if there exists one, or more, rigid motions which will map one figure onto the other.
When we state triangle congruency, the _____ of the letters in the names of the triangles is EXTREMELY important.
Side-Angle-Side (SAS) Congruence Postulate: If two sides and the ________ angle of one triangle are congruent to two sides and the included angle of a second triangle, then the two triangles are congruent.
A(n) ___________ triangle has three congruent sides.
________ angles are angles that are across from each other and are always congruent to one another.
A(n) _____ triangle has one right angle.
A(n) _______ triangle has no congruent sides.
Side-Side-Side (SSS) Congruence Postulate: If three _____ of one triangle are congruent to three _____ of a second triangle, then the two triangles are congruent.
By definition, an isosceles triangle is a triangle with ___ equal sides.