Math Problem Statement

The problem states that:

A B E F

B C F G

A C E G

EF AB ​

FG BC ​

EG AC ​ =2. Thus, the sides of ΔEFG are exactly half the lengths of the corresponding sides of ΔABC.

Solution

The problem essentially provides relationships between the sides of two triangles, ΔABC\Delta ABC and ΔEFG\Delta EFG, and states that the sides of ΔEFG\Delta EFG are half the lengths of the corresponding sides of ΔABC\Delta ABC.

Let’s break it down step by step:

Given Equalities:

  1. EFAB=FGBC=EGAC=2\frac{EF}{AB} = \frac{FG}{BC} = \frac{EG}{AC} = 2.

This means that each side of triangle ΔABC\Delta ABC is twice as long as the corresponding side of triangle ΔEFG\Delta EFG, or equivalently:

EF=12AB,FG=12BC,EG=12ACEF = \frac{1}{2} AB, \quad FG = \frac{1}{2} BC, \quad EG = \frac{1}{2} AC

So, the sides of ΔEFG\Delta EFG are exactly half the length of the corresponding sides of ΔABC\Delta ABC.

Conclusion:

From the ratios given, we can conclude that ΔEFG\Delta EFG is similar to ΔABC\Delta ABC, with a similarity ratio of 1:2, meaning that the sides of ΔEFG\Delta EFG are exactly half the lengths of the corresponding sides of ΔABC\Delta ABC.

Would you like me to go into more details about the properties of similar triangles or how to derive further properties from this similarity?

Related Questions:

  1. What are the properties of similar triangles?
  2. How can the area of ΔEFG\Delta EFG be compared to the area of ΔABC\Delta ABC?
  3. How do you prove two triangles are similar?
  4. Can this problem be generalized to non-equilateral triangles?
  5. What role does the ratio of side lengths play in triangle congruence?

Tip:

The ratio of corresponding side lengths in similar triangles is constant, but the ratio of their areas is the square of this ratio.

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Math Problem Analysis

Mathematical Concepts

Geometry
Similarity of Triangles
Ratios

Formulas

Ratio of sides in similar triangles: EF/AB = FG/BC = EG/AC = 1/2

Theorems

Similarity Theorem

Suitable Grade Level

Grades 8-10