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Q: What 2d shape has three sides and one right angle?

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A right-angle triangle.

A right triangle has three sides and one right angle.

A right angled triangle.

a right triangle

Scalene Triangle

A shape with three sides is called a triangle: 3 equal sides = equilateral 2 sides same length = isosceles 1 right angle = right-angled triangle

No because a triangle has three sides and triangle's are shape different.

with the three sides you know it will be a triangle, it is a right triangle, it is not an equilateral triangle or an isosceles triangle... so it must be a right scalene triangle

There are three sides.

A rectangle has four sides whereas a right angle triangle has only three sides.

The following shape has three sides and the only angles are right angles. ----- | |___

right angle triangle

All triangles have three sides.

All triangles have three sides.

A Right Triangle or sometimes called a Right-angled Triangle has one angle = 90 degrees

Three rhombi. Alternatively, a rhombus, and two irregular polygons with 5 or more sides, forur of which are equal. Apart from a rhombus there is no 4-sided shape that has equal sides but no right angles.

A triangle with a right angle and different lengths for sides is a right, scalene triangle.

All triangles have three sides. If it doesn't have three sides, it's not a triangle.

It could be an isosceles right triangle, or it could be a non-regular specimen of any polygon with more than three sides.

A right triangle.

To calculate any of the three sides in a right triangle, if you know the other two sides; also, to verify that an angle is a right angle, if you know three sides of a triangle.

Every triangle has three sides...

Apart from both being a geometric 2D shape, there is little similarity between the two. A rectangle has four parallel sides and a right-angle in each of the four corners. A right-angle triangle has three sides and only a right-angle in one corner.

A right angled triangle.

a right angle triangle has a right angle in it, whereas a traingle is the extremely general term for an object with three sides