A right angle.
It is an isosceles triangle.
It is called an equilateral triangle.
An equilateral triangle has three sides of equal length.
An isosceles triangle has two sides of equal length.
Segments of equal length are congruent segments.
congruent
a triangle has 3 line segments u are
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Perpendicular line segments intercept each other at 90 degrees which is a right angle.
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bathroom wall, window
Straight ones... Not truly lines, but segments
Parallel lines.
By definition, any lines/segments that are perpendicular to each other either do, or (in the case of non-intersecting segments) would, intersect each other at right angles. A right angle being a 90* angle. Therefore, perpendicular, intersecting line segments will form 4 90* angles.
Right Angle
Straight line segments