# Category: Math Circle Club

## Week 14-Geometry: Circles

Videos (11:12) Circle Notation (4:58) Length of an arc that subtends a central angle (2:18) Finding central angle measure given arc length (14:16) Inscribed and central angles (6:57) Perpendicular radius bisects chord (5:35) Right triangles inscribed in circles (11:39) Area of inscribed equilateral triangle (some basic trig used)

## Week 13-Similar Triangles

Videos: (9:17) Similar Triangles Basics (12:14) Similarity postulates (9:13) Similar Triangle example problems (7:37) Similarity Example problems (6:05) Example (9:53) Challenging similarity problem (10:07) Finding area using similarity and congruence Worksheet: 13-Similar Triangles

## Week 12-Congruent Triangles

Videos: (11:29) Congruent Triangles (13:28) Other triangle congruence postulates (7:28) Congruent Triangles -(7:24) Why SSA is not a postulate (5:46) Proof I -(12:41) Proof II (1:58) Basic Proof I -(2:53) Basic Proof II (8:15) Problem involving angle derived from square and circle Worksheet: 12-Congruent Triangles

## Week 11- Angles and Lines

Videos: *(12:57) Notation of Basic Geometry (3:38) Line segments, rays, and lines (4:43) Vertical Angles **(7:07) Angles formed by parallel lines and transversals (2:16) Application 1 *(4:41) Application 2 (6:03) Triangle Angle 1 *(4:55) Triangle Angle 2 *(5:42) Triangle Angle 3 *(5:18) Corresponding angle equivalence implies parallel lines Proof (6:05) Triangle Angle 4 **(9:11) Sum […]

## Week 09-Probability and Combinatorics

Worksheet: 09-Probability and Combinatorics

## Week 8-Trigonometric Identities

Formula Sheet Worksheet: 08-Trigonometric Identities

## Week 07-Sine Law and Cosine Law

Sine Law Ambiguous Case Cosine Law Worksheet: 07-Sine Law and Cosine Law Answer: Sine Law and Cosine Law

## Week 06-Logarithms and Exponents

For more information, please refer to Chapter 4 – Exponents and Logarithms, Pre-Calculus 12 Introduction to Logarithms: Exponential to Logarithmic Expressions Graphing Logarithmic Functions Properties of Logarithms Using Properties Logarithm Equations Worksheet: 06-Logarithms and Exponents