Chapter 4.1 Flashcards
(16 cards)
Equilateral triangle
Has three congruent sides
Isosceles triangle
Has at least two congruent sides
Scalene triangle
Has no congruent sides
Acute triangle
Has three acute angles
Equalangular triangle
Has three acute congruent angles
Right triangle
Has exactly one right angle
Obtuse triangle
Has exactly one obtuse angle
Vertex
Point of intersection of two sides
Opposite side
Any side opposite of a given angle
Adjacent side
Two sides that share a common vertex
Legs of a right triangle
Sides adjacent to the right angle
Hypotenuse of a right triangle
Side opposite the right angle
Legs of an isosceles triangle
Two congruent sides
Base of an isosceles triangle
Non-congruent side
Theorem 4.1 – properties of congruent triangles
1.every triangle is congruent to itself 2.if triangle ABC is congruent to triangle PQR, then triangle PQR is congruent to triangle ABC 3.if triangle ABC is congruent to triangle PQR & triangle PQR is congruent to triangle TUV, then triangle ABC is congruent to triangle TUV
Congruent triangles
If triangle ABC is congruent to triangle PQR, then there is a correspondence between their angles and sides such that corresponding angles are congruent and corresponding sides are congruent
