A right triangle has three sides and one right angle.
A Triangle~!
No a quadrilateral can't have 3 obtuse angles and 1 right angle because if a polygon did have 3 obtuse angles and 1 right angle then it would not even be a quadrilateral.
Every triangle have 6 main parts: 3 sides and 3 angles. On a right triangle one of the angles has to be a right angle, meaning it has a 90 degree angle.
There is only one regular polygon which contains right angles - this is a square. None of the other regular polygons from 3 sides and upwards has a right angle.
It is a right angle triangle
A right triangle has three sides and one right angle.
A Triangle~!
The longest side is always opposite the right angle so the sides of the right angle are 3 and 4 units.
triangle
right angled triangle
A right angle triangle.
a right triangle
Nope. A trapezoid has 4 sides, but only 2 of the sides are parallel. If there were 3 right angles, the 4th angle would also have to be a right angle, and both opposing sides would be parallel.
scalene triangle
A triangle.
trapzoid