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

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

Options:

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

Correct Answer: Isosceles

Solution: 

A triangle with two equal angles is an isosceles triangle.

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

Practice Questions

Q1
In triangle DEF, if angle D = 45° and angle E = 45°, what type of triangle is it?
  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 it?
  • Triangle Classification – Triangles can be classified based on their angles: an isosceles triangle has at least two equal angles.
  • Angle Sum Property – The sum of the angles in any triangle is always 180 degrees.
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