right angled triangle
On a sphere you can draw a triangle with three right angles. . At the North pole , zero meridian and its right angle 90 oW merdian. Draw these meridians to the Equator, and you will find they both meet the Equator at 90 o (degrees).
square
Parrallelagram
It depends on how many sides the spinner has, a detail that was not provided in the question. If the spinner has 7 sides, and there is only one 3, then the probability of landing on a 3 is 1 in 7, or about 0.1429.
a right triangle
a right angle triangle.
No because a quadrilateral has 4 sides whereas a triangle has 3 sides.
A perpendicular side is a right angle.A right angle is a perfectly L on any corner.The shape has to have no straight lines that meet.An example would be a triangle.
A right triangle has three sides and one right angle.
A right angle triangle
A right angle triangle
A right-angle triangle.
rectangle
A square and a rectangle.
A Triangle~!
a triangle