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Geometry

Angles and Lines

Intro

Concept Quizzes

Geometry Warmup - Angles and Lines
Basic Angle Chasing
Types of Angles
Complementary and Supplementary Angles
Parallel Lines
Perpendicular Lines
Patterns In Geometry
Angles and Lines - Problem Solving

Challenge Quizzes

Angles and Lines: Level 1 Challenges
Angles and Lines: Level 2 Challenges
Angles and Lines: Level 3 Challenges

Angles and Lines - Problem Solving

In parallelogram $ABCD$ , the green angle $\angle ABC = 58 ^ \circ$ . What is the pink angle $\angle ADC$ ?

29 ^\circ

32 ^\circ

45 ^\circ

58 ^\circ

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by Brilliant Staff

In the above diagram, line segment $\overline{AB}$ is parallel to line segment $\overline{CD}.$ If $\alpha={70}^\circ$ and $\beta={28}^\circ,$ then what is the angle $\angle OCD ?$

{82}^\circ

{87}^\circ

{92}^\circ

{97}^\circ

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by Brilliant Staff

Given quadrilateral $ABCD$ where $AB$ is parallel to $DC$ and $AC$ and $BD$ intersect at $E$ , with $\angle BEC = 58 ^\circ$ and $\angle ACD = 31 ^\circ$ , what is $\angle ABE$ (in degrees)?