right angled triangle
triangle
Oh honey, we're talking about rectangles here. They're like the cool kids of the quadrilateral world with their four sides and two right angles. So next time you see a shape with those specs, just remember it's a rectangle strutting its stuff.
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 circle
1/2 Because there is one side with heads (1/) and the total sides (/2)
A right-angle triangle.
A Triangle~!
A right angled triangle.
A square or a rectangle.
a ploygon or quadrilateral
no
A rhombus.
Rhombus, trapezoid, parallelogram
an "irregular pentagon"
triangle
a trapezoid
trapezoid