Has all congruent corresponding sides and all congruent corresponding angles
Given ΔJKL ≅ ΔXYZ, write down 3 congruence statements according to angles
<J ≅ <X
<K ≅ <Y
<L ≅ <Z
What do you have to remember when you're comparing two triangles?
Go in a clockwise when writing congruence statements
If 2 angles of one triangle are congruent to 2 angles of another triangle, than the 3rd angles are congruent
Third Angles Theorem
All 3 Pairs of corresponding sides are congruent and all 3 pairs of corresponding angles are congruent
What are 2 ways to classify a triangle?
By the number of congruent sides
by the type of angles the triangle has
What type of triangle has all sides congruent?
What type of triangle has at least 2 sides congruent?
What type of triangle has no congruent sides?
What type of triangle has all 3 angles acute?
What type of triangle has only 1 right angle?
What type of traingle has only 1 obtuse angle?
What type of triangle has all ANGLES congruent?
What is the sum of a triangle?
If something is equilaterial it is also classified as:
(4) (including equilaterial)
The measure of the exterior angle of a triangle is equal to the sum of the measures of the 2 remote interior angles
Triangle Exterior Angle Theorem
Angles furthest away from the exterior angle
Remote Interior angles