a) 3 сm 4 cm 5 сm

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
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Use the Pythagorean Theorem to find out if these are right triangles. Justify your answer Yes or no for each
### Geometry: Understanding Triangles

#### Triangular Measurements (Diagram a)

The following diagram represents a triangle with the lengths of its sides clearly marked:

- Side 1: 3 cm
- Side 2: 4 cm
- Side 3: 5 cm

**Explanation:**
This is a simple diagram of a triangle where each side is labeled with its respective length. This particular triangle is a right-angled triangle, as it follows the Pythagorean theorem (\(a^2 + b^2 = c^2\)), where \(a\), \(b\), and \(c\) are the lengths of the sides. For this triangle:
\[ 3^2 + 4^2 = 9 + 16 = 25 = 5^2 \]
Hence, the side opposite the right angle is 5 cm (the hypotenuse).

Understanding such diagrams is fundamental in geometry, as it helps in recognizing and solving problems related to triangular shapes and their properties.

### Key Concepts:
- **Right-Angled Triangle:** A triangle with one angle measuring 90 degrees. The side opposite this angle is the longest side, known as the hypotenuse.
- **Pythagorean Theorem:** In a right-angled triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

This diagram and the accompanying explanation serve as a basic illustration and application of elementary geometric principles.
Transcribed Image Text:### Geometry: Understanding Triangles #### Triangular Measurements (Diagram a) The following diagram represents a triangle with the lengths of its sides clearly marked: - Side 1: 3 cm - Side 2: 4 cm - Side 3: 5 cm **Explanation:** This is a simple diagram of a triangle where each side is labeled with its respective length. This particular triangle is a right-angled triangle, as it follows the Pythagorean theorem (\(a^2 + b^2 = c^2\)), where \(a\), \(b\), and \(c\) are the lengths of the sides. For this triangle: \[ 3^2 + 4^2 = 9 + 16 = 25 = 5^2 \] Hence, the side opposite the right angle is 5 cm (the hypotenuse). Understanding such diagrams is fundamental in geometry, as it helps in recognizing and solving problems related to triangular shapes and their properties. ### Key Concepts: - **Right-Angled Triangle:** A triangle with one angle measuring 90 degrees. The side opposite this angle is the longest side, known as the hypotenuse. - **Pythagorean Theorem:** In a right-angled triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. This diagram and the accompanying explanation serve as a basic illustration and application of elementary geometric principles.
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