Chapter 4 Section 4.1 Section 4.2 Section 4.3

Section 4.1 Angle Sum Conjecture The sum of the interior angles of a triangle add to 180

Section 4.2 Isosceles Triangles Legs are congruent Base angles are congruent

Section 4.3 Triangle Inequality Conjecture The sum of the shorter two sides of a triangle needs to be greater than the longest side Side-Angle Inequality Conjecture The longest side is across from the largest angle The shortest side is across from the smallest angle

More 4.3 Exterior Angle Conjecture The exterior angle of a triangle is equal to the sum of the two remote interior angles, angles that are not touching the exterior angle

More 4.3 We know that Pythagorean Theorem is used in right triangles only, so it helps us to determine the triangle is right We can use the same equation to determine if the triangle is acute or obtuse Obtuse Acute