TechMathI - 3.4 - The Triangle Sum Theorem
8
Bell Ringer 1 5x - 6 3x + 4 . Find measure of x. 2. Find measure of <1. 2 3 3. Find measure of <2. 4. Find measure of <3.
Transcript of TechMathI - 3.4 - The Triangle Sum Theorem
Bell Ringer
1
5x - 63x + 4
1. Find measure of x.
2. Find measure of <1.
2
3
3. Find measure of <2.
4. Find measure of <3.
Triangle- a triangle consists of three noncollinear points and the line segments connecting them
Equilateral - has three congruent sides
Isosceles- has two congruent sides
Scalene- has no congruent sides
Triangles
Acute Triangle- has three acute angles
Equiangular Triangle- has three congruent angles
Right Triangle- has exactly one right angle
Obtuse Triangle- has one obtuse angle
Leg Leg
BaseBase Angle Base Angle
- the sum of the measures of a triangle is 180°
- the measure of the exterior angle is equal to the sum of the two remote interior angles
142
3
110°?
60°
Example 1:
155°
95°
Example 2:
2
3
1. Find <1.
2. Find <2.
3. Find <3.
38°
x
y z
48°
You try!
Find x, y, and z.
