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In triangle DEF, if angle D = 45° and angle E = 45°, what type of triangle is DE

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Question: In triangle DEF, if angle D = 45° and angle E = 45°, what type of triangle is DEF?

Options:

  1. Scalene
  2. Isosceles
  3. Equilateral
  4. Right

Correct Answer: Isosceles

Solution: 

Since two angles are equal, triangle DEF is an isosceles triangle.

In triangle DEF, if angle D = 45° and angle E = 45°, what type of triangle is DE

Practice Questions

Q1
In triangle DEF, if angle D = 45° and angle E = 45°, what type of triangle is DEF?
  1. Scalene
  2. Isosceles
  3. Equilateral
  4. Right

Questions & Step-by-Step Solutions

In triangle DEF, if angle D = 45° and angle E = 45°, what type of triangle is DEF?
  • Triangle Classification – Understanding the properties of triangles based on their angles and sides.
  • Isosceles Triangle – A triangle with at least two equal angles and sides.
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