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In triangle DEF, if angle D is 45 degrees and angle E is 45 degrees, what is the

Practice Questions

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

Questions & Step-by-Step Solutions

In triangle DEF, if angle D is 45 degrees and angle E is 45 degrees, what is the type of triangle?
  • Step 1: Identify the angles given in triangle DEF. We have angle D = 45 degrees and angle E = 45 degrees.
  • Step 2: Recall the definition of an isosceles triangle. An isosceles triangle has at least two equal angles.
  • Step 3: Since angle D and angle E are both 45 degrees, they are equal.
  • Step 4: Conclude that triangle DEF has at least two equal angles, which means it is an isosceles triangle.
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