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Question

For the given side lengths of a triangle, match the following to the type of triangle.

A
Isosceles Right △
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B
Isosceles △
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C
Scalene Right △
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D
Scalene △
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Solution

Let's take the sides one by one and try to find the type of triangle.
A. 3,4,5
The sides are not equal, hence it's a scalene triangle.
Moreover, 32+42=25=52
It's a right triangle too,
Hence, it's a scalene right triangle.
B. 2,3,4
The sides are not equal, hence it's a scalene triangle.
Moreover, 22+32=1342
It's not a right triangle.
Hence, it's a scalene triangle.
C. 4,4,5
Two sides are equal, hence it's an isoceles triangle.
Moreover, 42+42=3252
It's not a right triangle,
Hence, it's an isosceles triangle.
D. 3,3,32
Two sides are equal, hence it's an isosceles triangle.
Moreover, 32+32=18=(32)2
It's a right triangle too,
Hence, it's an isosceles right triangle.

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