Table of contents

0. Review of College Algebra4h 43m
1. Measuring Angles40m
2. Trigonometric Functions on Right Triangles2h 5m
3. Unit Circle1h 19m
4. Graphing Trigonometric Functions1h 19m
5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
6. Trigonometric Identities and More Equations2h 34m
7. Non-Right Triangles1h 38m
8. Vectors2h 25m
9. Polar Equations2h 5m
10. Parametric Equations1h 6m
11. Graphing Complex Numbers1h 7m

1. Measuring Angles

Complementary and Supplementary Angles

Trigonometry

1. Measuring Angles

Complementary and Supplementary Angles

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2:09 minutes

Problem 8

Textbook Question

CONCEPT PREVIEW Name the corresponding angles and the corresponding sides of each pair of similar triangles.

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Identify the two triangles that are given in the problem and note their vertices.

Recall that similar triangles have corresponding angles that are equal and corresponding sides that are proportional.

List the angles of the first triangle and match them with the angles of the second triangle based on their positions.

List the sides of the first triangle and match them with the sides of the second triangle based on their positions.

Ensure that the order of the vertices in the triangle names reflects the correspondence of angles and sides.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Similar Triangles

Similar triangles are triangles that have the same shape but may differ in size. This means that their corresponding angles are equal, and the lengths of their corresponding sides are proportional. Understanding the properties of similar triangles is essential for identifying corresponding angles and sides, which is crucial in solving problems related to geometry and trigonometry.

Corresponding Angles

Corresponding angles are pairs of angles that are in the same relative position in similar triangles. For example, if two triangles are similar, the angle in one triangle that corresponds to an angle in the other triangle will have the same measure. Recognizing these angles is vital for establishing the relationship between the triangles and applying the properties of similarity.

Proportional Sides

Proportional sides refer to the sides of similar triangles that maintain a constant ratio to each other. If two triangles are similar, the lengths of their corresponding sides can be expressed as a ratio, which remains consistent across all pairs of corresponding sides. This concept is fundamental in solving problems involving scale factors and in applying the properties of similar triangles to find unknown lengths.