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In triangle DEF, if angle D = 45 degrees and angle E = 45 degrees, what is the t
In triangle DEF, if angle D = 45 degrees and angle E = 45 degrees, what is the type of triangle? (2020)
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In triangle DEF, if angle D = 45 degrees and angle E = 45 degrees, what is the type of triangle? (2020)
Scalene
Isosceles
Equilateral
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Since two angles are equal (45 degrees), triangle DEF is an isosceles triangle.
Questions & Step-by-step Solutions
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Q
Q: In triangle DEF, if angle D = 45 degrees and angle E = 45 degrees, what is the type of triangle? (2020)
Solution:
Since two angles are equal (45 degrees), triangle DEF is an isosceles triangle.
Steps: 4
Show Steps
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 two equal angles, which means it is an isosceles triangle.
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