Chapter 3

Angles and Triangles

Section 0 - Complementary, Supplementary, and Vertical Angles

• Khan Academy - Identify Supplementary, Complementary, and Vertical Angles

• IXL - Identify Supplementary, Complementary, Vertical, Adjacent and Congruent Angles

• Khan Academy - Angles Between Intersecting Lines

Section 1 - Parallel Lines and Traversals

• IXL - Find Angle Measures

• Khan Academy - Angle relationships with parallel lines (Solve for x)

• Khan Academy - Equation practice with angle relationships

• IXL - Name Angle Pairs

Section 2 - Angles of Triangles

• Khan Academy - Find angles in triangles

• Khan Academy - Find angles in isosceles triangles

• IXL - Exterior angles (Includes equation practice)

• Khan Academy - Exterior Angles

• Khan Academy - Understanding Exterior Angles

• Khan Academy - Find angles using triangles (with parallel lines or exterior angles) *Can be challenging

Section 3 - Angles of Polygons

*not an 8th grade math standard

Section 4 - Using Similar Triangles

• Khan Academy - Determine similar triangles: AA

• Khan Academy - Determine similar triangles: SSS

• Similar triangles and indirect measurement (Find the missing side length)

• IXL - Similar triangles and indirect measurement (Find the missing side length)