What kind of triangle is given in the drawing?
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What kind of triangle is given in the drawing?
Given that sides AB and AC are both equal to 9, which means that the legs of the triangle are equal and the base BC is equal to 5,
Therefore, the triangle is isosceles.
Isosceles triangle
Is the triangle in the drawing a right triangle?
Isosceles triangles have exactly two equal sides, while equilateral triangles have all three sides equal. In this case, 9, 9, 5 shows two equal sides, making it isosceles.
Think of it like this: Scalene = all different, Isosceles = two same, Equilateral = all same. Count how many sides match!
No! This violates the triangle inequality. The sum of any two sides must be greater than the third side. Here, 9 + 9 = 18, which equals (not greater than) the third side.
Always look for the numerical labels on each side rather than trying to judge by eye. Drawings aren't always to scale, but the numbers tell you the exact lengths.
Not at all! Whether the equal sides are adjacent (next to each other) or opposite doesn't change the classification. Two equal sides anywhere makes it isosceles.
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