CK-12 Geometry Concepts
http://www.ck12.org Chapter 4. Triangles and Congruence 4.1 Triangle Sum Theorem Here you’ll learn that the sum of the angles in ...
4.1. Triangle Sum Theorem http://www.ck12.org Investigation: Triangle Tear-Up Tools Needed: paper, ruler, pencil, colored pencil ...
http://www.ck12.org Chapter 4. Triangles and Congruence 4 ABCabove is an example of an equiangular triangle, where all three ang ...
4.1. Triangle Sum Theorem http://www.ck12.org Isosceles: At least two sides are congruent. Equilateral: All three sides are cong ...
http://www.ck12.org Chapter 4. Triangles and Congruence Two interior angles of a triangle measure 111◦and 12◦. What is the thir ...
4.2. Exterior Angles Theorems http://www.ck12.org 4.2 Exterior Angles Theorems Here you’ll learn what an exterior angle is as we ...
http://www.ck12.org Chapter 4. Triangles and Congruence Guidance Anexterior angleis the angle formed by one side of a polygon an ...
4.2. Exterior Angles Theorems http://www.ck12.org Example B Find the measure of the numbered interior and exterior angles in the ...
http://www.ck12.org Chapter 4. Triangles and Congruence Vocabulary Interior anglesare the angles on the inside of a polygon whil ...
4.2. Exterior Angles Theorems http://www.ck12.org 10. 11. 12. Suppose the measures of the three angles of a triangle are x, y, ...
http://www.ck12.org Chapter 4. Triangles and Congruence 4.3 Congruent Triangles Here you’ll learn what it means for two triangle ...
4.3. Congruent Triangles http://www.ck12.org When referring to corresponding congruent parts of congruent triangles, you can use ...
http://www.ck12.org Chapter 4. Triangles and Congruence CK-12 Foundation: Chapter4CongruentTrianglesB Concept Problem Revisited ...
4.3. Congruent Triangles http://www.ck12.org Both triangles are obtuse triangles in which one angle measures 35◦. Two of their ...
http://www.ck12.org Chapter 4. Triangles and Congruence 4.4 Congruence Statements Here you’ll learn how to write a congruence st ...
4.4. Congruence Statements http://www.ck12.org 4 ACB∼= 4 LNM 4 BCA∼= 4 MNL 4 BAC∼= 4 MLN 4 CBA∼= 4 NML 4 CAB∼= 4 NLM One congrue ...
http://www.ck12.org Chapter 4. Triangles and Congruence Guided Practice If 4 ABC∼= 4 DEF, what else do you know? If 4 KBP∼= 4 M ...
4.5. Third Angle Theorem http://www.ck12.org 4.5 Third Angle Theorem Here you’ll learn the Third Angle Theorem and how to use it ...
http://www.ck12.org Chapter 4. Triangles and Congruence Example A Determine the measure of the missing angles. From the markings ...
4.5. Third Angle Theorem http://www.ck12.org Guided Practice Determine the measure of all the angles in the each triangle. ...
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